🖤 Fun Factory Iku Tight Stackable Open-ended Masturbator
Ultra-Tight Entrance, Textured Channel & Magnetic Modular Design 🔥
A tighter entrance makes every controlled movement feel more defined.
The Fun Factory IKU Tight is a modular, open-ended manual stroker designed for close-fitting pressure and textured friction. Its ultra-tight ring-shaped entrance features flexible contracting folds that stretch and rebound with each movement, while raised internal ridges create changing contact throughout every stroke.
A removable soft insert simplifies cleaning, and the ergonomic outer shell gives you stable control over speed, pressure and rhythm. The Magnetic Click modular system also connects to compatible IKU components, allowing you to extend or customise the stimulation channel.
Please note: IKU Tight is a manual stroker. It has no motor, vibration or automatic stroking function and does not require charging.
🚀 IKU Tight Highlights
✅ Ultra-tight ring-shaped entrance
✅ Flexible contracting folds
✅ Textured open channel with raised ridges
✅ Through-hole design for flexible insertion depth
✅ Removable soft insert for easier cleaning
✅ Magnetic Click modular system
✅ Connects with compatible IKU components
✅ Ergonomic rigid shell for controlled handling
✅ IPX7 waterproof construction
✅ No motor, battery or charging required
✅ Compact and discreet design
From slow, full strokes to shorter focused movements, every part of the rhythm remains in your hands.
⭕ Ultra-Tight Ring Entrance
The thick ring-shaped entrance gently stretches during entry and contracts around the body to create focused pressure.
✔ Noticeably close-fitting entrance
✔ Flexible folds stretch and rebound
✔ Changes sensation during manual movement
✔ Grip and speed influence the pressure
✔ Designed for users who prefer a tighter feel
Generous water-based lubricant is essential. Stop immediately and apply more lubricant if you experience pinching, pulling, pain or excessive resistance.
〰️ Textured Open-Ended Channel
Raised internal ridges create changing points of contact as the stroker moves, adding detailed friction and tactile variation to each stroke.
✅ Layered internal ridges
✅ Open-ended construction
✅ Flexible insertion direction and depth
✅ Allows air and excess lubricant to pass through
✅ Reduces the intense vacuum of some closed sleeves
✅ Easier to rinse and dry thoroughly
Try gently rotating your wrist during each movement to change the direction in which the textured channel glides across the skin.
🧲 Magnetic Click Modular System
IKU Tight uses magnetic connection points to align with compatible IKU components.
✔ Quick magnetic attachment
✔ Easy component alignment
✔ Combine compatible IKU modules
✔ Extend the stimulation channel
✔ Mix different entrances and textures
✔ Separate easily for cleaning
The magnets help align the components. Check that every part is correctly positioned before use and stop immediately if anything becomes loose, misaligned or damaged.
Additional IKU modules may be sold separately.
💎 Removable Soft Insert
The flexible body-contact insert stretches, bends and rebounds with your movements, creating a close-fitting yet responsive feel.
✅ Soft body-contact surface
✅ Flexible, responsive construction
✅ Pressure changes with movement
✅ Removable from the outer shell
✅ Easier access to internal grooves during cleaning
The product combines silicone and TPE materials with magnetic components. Inspect the insert before each use and discontinue use if you notice cracks, deformation, peeling or unusual stickiness.
✋ Complete Manual Control
IKU Tight does not vibrate or move automatically. You control the speed, stroke length, pressure and angle.
Slow, Full Strokes
Use longer movements to feel the tight entrance and raised internal texture glide gradually across the skin.
Short, Focused Strokes
Use shorter movements around a preferred area for more concentrated friction.
Rotating Movements
Gently turn your wrist during each stroke to change how the ridges make contact.
Changing Grip
Use the supportive shell to guide the angle and rhythm. Never squeeze excessively or force the body through the entrance.
🤲 Ergonomic Outer Shell
The compact, rounded shell sits securely in the hand and provides stable control over each movement.
✔ Comfortable palm-sized shape
✔ Suitable for one-handed use
✔ Easy speed and pressure control
✔ Simple angle adjustments
✔ Discreet matte-black appearance
Its compact 74 mm shape is easy to store in a bedside drawer, travel bag or separate toy pouch.
🔓 Open-Ended Construction
The through-hole design offers greater freedom over insertion direction and depth while allowing air and excess lubricant to move through the channel.
Partially cover the opposite opening with your palm to experiment gently with airflow and suction. Release it immediately if the pressure causes uncomfortable pulling.
The open structure also allows water to flow directly through the channel during cleaning, helping reduce hard-to-reach areas.
🌊 IPX7 Waterproof
IKU Tight has an IPX7 waterproof rating, making it suitable for wet environments and convenient to rinse after use.
✅ Suitable for shower use
✅ Supports limited short-term immersion as directed
✅ Open channel rinses easily
✅ Removable insert supports deeper cleaning
✅ No electronic components
Water is not a substitute for lubricant and may wash lubricant away. Continue using a suitable water-based formula during wet play and reapply when necessary.
🔇 No Motor and No Charging
Because IKU Tight is completely manual:
✅ No charging required
✅ No disposable batteries
✅ No motor noise
✅ No operating-time limit
✅ Ready whenever you are
✅ No charging cable needed for travel
It is quiet, straightforward and ideal for anyone who prefers direct control over pressure and pace.
💗 Solo and Partnered Ideas
Manual Solo Play
Adjust the speed, depth, angle and grip according to your body’s response.
Partner-Controlled Stimulation
Let a partner guide the stroker and introduce unexpected changes in rhythm. Communicate continuously and avoid excessive speed or pressure.
Add External Vibration
Use a separate vibrator against the perineum, testicles or another external area while operating IKU Tight manually.
Combine IKU Modules
Connect compatible IKU components through the Magnetic Click system to extend the channel or combine different textures and levels of tightness.
📊 Product Specifications
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Brand: FUN FACTORY
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Collection: IKU
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Model: IKU Tight
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Product type: Modular open-ended manual stroker
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Primary function: Manual stroking stimulation
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Entrance: Ultra-tight ring with contracting folds
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Interior: Textured channel with raised ridges
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Opening: Open-ended／through-hole
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Connection: Magnetic Click modular system
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Insert: Removable soft insert
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Product dimensions: Approx. 74 × 74 × 31 mm
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Product weight: Approx. 86 g
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Package dimensions: Approx. 85 × 78 × 40 mm
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Package weight: Approx. 113 g
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Materials: Magnets, silicone and TPE
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Waterproof rating: IPX7
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Motor／vibration: Not applicable
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Battery／charging: Not applicable
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Colour: Black
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Age requirement: Adults aged 18 and over
Measurements may vary slightly according to the measuring method and production batch. Compatible modules may be sold separately; refer to the package contents received.
💡 How to Use
- Separate and thoroughly clean the insert and all components before first use.
- Once dry, place the soft insert correctly inside the outer shell.
- Align the modular component and allow the Magnetic Click system to connect.
- Apply plenty of water-based lubricant to the body, entrance and internal channel.
- Gently open the entrance with your fingers and enter slowly without forcing it.
- Hold the shell and begin with comfortable manual strokes.
- Adjust the length, angle and speed or introduce gentle rotation.
- Reapply lubricant immediately if friction increases or the surface begins to dry.
- Withdraw slowly after use, separate every component and clean thoroughly.
💧 Lubricant Recommendation
Use a generous amount of water-based lubricant and reapply whenever necessary.
Avoid massage oil, petroleum jelly and other oil-based products, as they may damage the soft materials. Silicone lubricant may also be incompatible with some silicone or TPE surfaces. Check the manufacturer’s instructions and perform a small compatibility test first.
🧼 Cleaning and Care
✅ Separate every component before and after use
✅ Remove the soft insert from the outer shell
✅ Wash with warm water and mild soap or toy cleaner
✅ Clean carefully around the folds, ridges and grooves
✅ Rinse away all cleaning residue
✅ Leave every component separated to air-dry
✅ Reassemble and store only when completely dry
Never store the product while damp, as retained moisture may cause odours or microbial growth. Avoid bleach, alcohol, acetone and abrasive cleaners. Do not place it in a washing machine or dishwasher.
⚠️ Safety Information
- For adults aged 18 and over only.
- This is a manual stroker, not an electric or automatic masturbator.
- Always use plenty of lubricant with the ultra-tight entrance.
- Stop immediately if you experience pain, numbness, pinching or broken skin.
- Never use numbing products to conceal discomfort.
- Inspect the insert, shell and magnetic connections before use.
- Discontinue use if the material becomes cracked, deformed, unusually sticky or impossible to clean thoroughly.
- When sharing, use an appropriate barrier and clean every component between users.
- Keep the magnetic components away from magnetic cards, precision electronics, pacemakers and other medical devices that may be affected by magnets.
Focused pressure at the entrance, layered texture inside and magnetic freedom to expand—IKU Tight puts every movement under your control. 🖤🔥
