🖤 Fun Factory Iku Flex Stackable Open-ended Masturbator
Star-Shaped Texture, Magnetic Modules & Full Manual Control 🔥
No motor. No fixed rhythm. Every movement is completely in your hands.
The Fun Factory IKU Flex is a modular, open-ended manual stroker with a star-shaped channel and raised internal ridges. Each back-and-forth movement creates changing pressure, friction and resistance for a detailed, responsive sensation.
Its soft removable silicone insert offers a skin-like feel, while the ergonomic outer structure provides a secure grip. The Magnetic Click modular system also lets you connect compatible IKU pieces to extend and customise the experience.
🚀 IKU Flex Highlights
✅ Star-shaped open-ended channel
✅ Raised ridges for layered stimulation
✅ Through-hole design allows flexible insertion depth
✅ Soft, skin-friendly silicone insert
✅ Removable construction for easier cleaning
✅ Magnetic Click modular connection system
✅ Combines with compatible IKU styles
✅ Ergonomic outer structure for a secure grip
✅ IPX7 waterproof construction
✅ Fully manual—no battery or charging required
✅ Compact, discreet and travel-friendly
From slow full-length strokes to short, focused movements, you decide exactly how the experience feels.
✨ Star-Shaped Textured Channel
At the centre of IKU Flex is an open star-shaped channel filled with flexible lobes and stimulating ridges.
The soft internal structures move and adapt during each stroke, creating changing contact, friction and natural resistance. Unlike a plain smooth sleeve, the textured interior gives every movement a more detailed tactile response.
✔ Star-shaped internal opening
✔ Multiple flexible lobes
✔ Raised stimulating ridges
✔ Natural resistance during movement
✔ Explore straight or rotating strokes
Try gently rotating your wrist during each stroke to move the internal texture across the skin from different directions.
🔓 Open-Ended Design
The through-hole construction does not restrict insertion direction or depth. It also allows air and excess lubricant to move through the channel, helping reduce the strong vacuum effect associated with some closed-end sleeves.
✅ Flexible insertion depth
✅ Air can pass through the channel
✅ Easier control over suction and pressure
✅ Excess lubricant can escape
✅ Interior is easier to rinse and dry
You can partially cover the opposite opening with your palm to experiment with airflow and suction. Release it immediately if the pressure creates uncomfortable pulling.
🧲 Magnetic Click Modular System
Want a longer channel or a combination of different textures and levels of tightness?
The IKU Magnetic Click system allows compatible pieces to align and connect, giving you the option to build a personalised stroker from different IKU styles.
✔ Quick magnetic connection
✔ Components align easily
✔ Combine compatible IKU modules
✔ Extend the stimulation channel
✔ Mix different internal textures
✔ Simple to separate for cleaning
The magnets help position the components. Always check that every piece is aligned and securely connected before use. Stop if a component becomes loose, misaligned or damaged.
💎 Soft, Skin-Friendly Insert
The removable body-contact insert feels soft and smooth against the skin, flexing gently to accommodate movement and changes in pressure.
✅ Soft and flexible feel
✅ Silky body-contact surface
✅ Responds to different grip pressures
✅ Glides smoothly with lubricant
✅ Removable for thorough cleaning
IKU Flex uses body-friendly silicone and TPE to combine softness, stretch and structural support.
✋ Fully Manual Stimulation
IKU Flex is not an electric masturbator. It has no motor, vibration or automatic stroking function.
Its manual design gives you direct control over every movement.
Slow, Full Strokes
Use longer, slower movements to feel the star-shaped texture travel gradually across the skin.
Short, Faster Movements
Focus short strokes around a preferred area for more concentrated friction.
Rotating Strokes
Turn your wrist gently during each movement to change the direction of the internal ridges.
Focused Massage
Hold the stroker around a sensitive area and use small back-and-forth or rotating movements.
If the friction feels too strong or causes uncomfortable pulling, add more water-based lubricant and reduce your speed.
🤲 Ergonomic Grip
The rounded outer structure is designed to sit securely in the hand, helping you control movement, angle and pressure.
✔ Comfortable palm-sized shape
✔ Suitable for one-handed use
✔ Easy pressure adjustment
✔ Secure handling in wet or dry settings
✔ Use from different directions
There is no need to squeeze the product excessively. Small changes in grip may be enough to alter the pressure and resistance inside the channel.
💦 Change the Experience with Lubricant
Generous lubrication is essential for comfortable use.
The amount you apply can noticeably change the character of the internal texture:
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Less lubricant: More noticeable friction and texture
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More lubricant: Smoother gliding and longer strokes
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Reapplication: Prevents pulling as lubricant begins to dry
Apply water-based lubricant to both the body and the entrance, then use a finger to spread a small amount inside the channel.
🌊 IPX7 Waterproof
IKU Flex has an IPX7 waterproof design, making it suitable for wet environments such as the shower and convenient to rinse after use.
✅ Suitable for shower play
✅ Outer structure can be rinsed
✅ Removable insert supports deeper cleaning
✅ Open channel makes residue easier to remove
✅ No electronic components
Water does not replace lubricant and may wash existing lubricant away. Continue using a suitable water-based lubricant during shower play and reapply when necessary.
🔇 No Motor and No Charging
As IKU Flex is completely manual:
✅ No charging required
✅ No disposable batteries
✅ No motor noise
✅ Ready whenever you are
✅ No battery-life limit
✅ No charging cable needed for travel
Simple, quiet and direct—it is designed for anyone who prefers complete control over their own rhythm.
👜 Compact and Discreet
The minimalist black shape is discreet and easy to keep in a bedside drawer, travel bag or separate toy pouch.
✔ Compact construction
✔ Minimalist appearance
✔ Easy to store
✔ Convenient for travel
✔ Expandable with compatible modules
Clean and dry every component completely before placing the product in a travel or storage pouch.
💗 Solo and Partnered Play Ideas
Manual Solo Play
Control the speed, depth, angle and grip according to your body’s response.
Partner-Controlled Stimulation
Let a partner guide the stroker and introduce changes in pace, direction and pressure. Communicate about comfort throughout use.
Combine with External Toys
Add an external vibrator against the perineum, testicles or another sensitive area while using IKU Flex manually.
Connect Compatible IKU Modules
Use the Magnetic Click system to combine compatible IKU pieces, extend the channel or blend different internal profiles.
📊 Product Specifications
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Brand: FUN FACTORY
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Collection: IKU
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Model: IKU Flex
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Product type: Modular open-ended manual stroker
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Primary function: Manual stroking stimulation
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Internal design: Star-shaped channel with raised ridges
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Opening: Through-hole/open-ended
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Connection: Magnetic Click modular system
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Insert: Removable soft silicone insert
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Materials: Body-friendly silicone and TPE
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Waterproof rating: IPX7
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Battery: Not required
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Charging: Not required
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Colour: Black
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Age requirement: Adults aged 18 and over
Compatible modules and other IKU styles may be sold separately. Package contents should be confirmed from the product received.
💡 How to Use
- Separate and thoroughly clean all components before first use.
- Make sure the insert is completely dry and correctly positioned.
- If adding compatible modules, align the connection points and allow the magnetic system to click into place.
- Apply plenty of water-based lubricant to the body and internal opening.
- Gently open the entrance with your fingers and enter slowly without forcing it.
- Hold the outer structure and begin with comfortable manual strokes.
- Change the grip, angle, stroke length or rotation to explore different sensations.
- Reapply lubricant immediately if it begins to dry.
- After use, withdraw slowly, separate all parts and clean them immediately.
Check that magnetic components are properly connected before use. Keep the magnetic system away from pacemakers and other medical devices that may be affected by magnets.
🧼 Cleaning and Care
✅ Clean before and after every use
✅ Separate all magnetic components
✅ Remove the soft insert from the outer structure
✅ Wash with warm water and mild soap or toy cleaner
✅ Open or turn the insert to clean every ridge and recess
✅ Rinse away all cleaning residue
✅ Leave each part separated until completely dry
✅ Reassemble only when fully dry
Never seal the product away while damp, as retained moisture may cause odours or microbial growth. Do not use bleach, alcohol, acetone, gasoline or abrasive cleaners. Never place it in a washing machine or dishwasher.
💧 Lubricant Recommendation
Use a generous amount of water-based lubricant and reapply whenever necessary.
Avoid massage oils, petroleum jelly and other oil-based products. Silicone lubricant may be incompatible with some silicone or TPE surfaces. Consult the manufacturer’s instructions and perform a small material test before using another formula.
⚠️ Safety Information
- For adults aged 18 and over only.
- IKU Flex is a manual stroker, not an electric or automatic masturbator.
- Inspect the insert, outer structure and magnetic connections before use.
- Never force the body into a dry or insufficiently lubricated channel.
- Stop immediately if you experience pain, numbness, broken skin or persistent discomfort.
- Never use numbing products to conceal pain.
- Discontinue use if the material becomes cracked, unusually sticky, deformed or impossible to clean thoroughly.
- When sharing, use an appropriate barrier and clean thoroughly between users.
- Keep the magnetic components away from magnetic cards, precision electronics and medical devices affected by magnetic fields.
Layered star-shaped texture, effortless magnetic expansion and a rhythm controlled entirely by you—build your experience with IKU Flex. 🖤🔥
