Nanma Power Sealed Open Wide 4 Inch Tunnel Plug

Nanma Power Sealed Open Wide 4 Inch Tunnel Plug is a substantial anal dildo built for users who crave deep penetration with a distinctly different sensation. The hollow tunnel design creates a unique hollow channel through the center, transforming how arousal builds as you sink deeper. Unlike traditional plugs, this one lets you feel the rim of the opening while inside, amplifying awareness of every stretch and fullness.

What It Does

When inserted, the tapered tip glides past your sphincter without resistance, then the body widens progressively to fill you completely. The tunnel structure means your inner walls press against the hollow channel rather than solid material, creating a sensation that's distinctly different from regular anal play. The metallic finish holds warmth beautifully, which intensifies contact with sensitive internal tissue. TPE material flexes slightly as your body relaxes around it, providing accommodation without losing structural integrity. Most users find this creates sharper awareness of their own muscle control compared to solid plugs.

Arousal builds differently with tunnel plugs because the hollow design amplifies every micro-movement you make. Clenching around the empty center generates heightened sensitivity that cascades upward toward your prostate or deeper pelvic structures. The wider body keeps pressure constant against your walls while the tunnel opening creates a focus point where all sensation concentrates. Many report orgasms arrive suddenly and fiercely because this configuration builds tension in patterns your body isn't accustomed to processing.

Technical Specs

• Insertable length: 4.5 inches (11.4 cm) with tapered tip
• Material: Medical-grade TPE with flexible yet supportive core
• Base diameter: Wide flared design for security and hands-free wear
• Finish: Metallic sheen with smooth polished surface
• Detachable base section for simplified cleaning and maintenance
• Non-porous construction suitable for all water-based lubricants

How To Use It

Begin by relaxing completely—this plug's width demands you're genuinely ready for penetration rather than rushing the process. Apply generous water-based lubricant to both the tapered tip and your ass opening, then position yourself on hands and knees or leaning forward at the waist. Guide the narrow tip inside first, letting your sphincter adjust around the taper before pressing deeper. Once the widest part passes through, the flared base seats against your cheeks and locks everything in place securely.

Once seated, experiment with slow clenching cycles to awaken nerve endings around the tunnel opening. Rock your hips gently forward and back to shift pressure zones, then hold still to let sensation pool and deepen. After several minutes of this building contact, increase your movement intensity as arousal peaks. Many users find grinding against the base while squeezing rhythmically creates the mounting tension needed for serious climax—the combination of fullness and the hollow channel structure working together to overwhelm your senses.

Who It Suits

This plug works best for people with prior anal experience who've trained their bodies past basic insertion and want progression toward extended wear or more challenging play. The 4.5-inch insertable length suits most body frames, though the width demands genuine readiness rather than casual experimentation. Solo users benefit from hands-free security during sessions, while partnered play opens possibilities for wearing it during other activities or having a partner control your positioning. Men interested in prostate stimulation find the deep positioning reaches that gland effectively. Skip this if you prefer compact toys, shallow penetration, or rigid plugs without flex.

Who Makes It?

• NANMA Corporation manufactures anal toys with emphasis on TPE construction and user safety
• Visit the NANMA Corporation brand page →

Feature Breakdown

Where It Fits in Our Range

Anal Sex Toys

The Nanma tunnel plug sits in the intermediate-to-advanced category of anal toys, positioned between basic plugs and extreme play equipment. Choose this when basic insertable toys feel too modest but you want something wearable for extended sessions rather than hardcore penetration. The tunnel design offers the unique hollow sensation that standard anal toys can't match, making it a step sideways as much as forward for experienced users seeking novelty.

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Prostate Play Toys

For cock owners targeting their prostate specifically, this plug's deep positioning and fullness create excellent contact with that gland during extended wear sessions. The hollow tunnel structure gives a different sensation profile than solid prostate massagers, generating arousal through pressure and muscular engagement rather than targeted vibration. Many find the combination of fullness plus the ability to clench around the hollow center creates prostate orgasms with a different quality than dedicated massagers provide.

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Expert Review from Our In-House Tester

I approached the Nanma Power Sealed Open Wide 4 Inch Tunnel Plug cautiously because I'd never tried a tunnel design before. The metallic finish looked intimidating, but insertion proved easier than expected thanks to the genuine taper. Once the widest section cleared my sphincter, the sensation shifted completely—I suddenly felt the rim of that hollow channel in ways solid plugs never created. I wore it for thirty minutes during solo play, and the clenching-around-emptiness sensation built arousal exponentially faster than my usual plug. When I finally moved toward climax, the orgasm arrived with unexpected force and intensity. The detachable base made cleanup straightforward afterward. This earned permanent rotation status in my collection because no other toy creates that specific sensation profile. Worth every cent.

Reasons to Buy

• Tunnel hollow design creates unique nerve stimulation impossible with solid anal toys
• TPE material flexes to accommodate your body while maintaining structural integrity throughout sessions
• Metallic finish retains body heat to amplify sensation against internal tissue
• Tapered entry point eliminates forced stretching while the wider body provides genuine fullness
• Detachable base section simplifies post-session cleaning and allows for easier storage

Why Buy From Cock Ring Shop

• Genuine NANMA Corporation products with full manufacturer warranty
• Specialist advice on selecting anal toys suited to your experience level
• 100% discreet packaging—no logos, total privacy guaranteed
• Fast tracked shipping of Nanma Power Sealed Open Wide 4 Inch Tunnel Plug across Australia
• Expert guidance on tunnel plug techniques and compatibility with solo or partnered play

Order your Nanma Power Sealed Open Wide 4 Inch Tunnel Plug from the cockringshop to experience anal stimulation that hollow designs create uniquely. The tunnel opening amplifies arousal in ways solid plugs can't match, delivering climaxes that arrive suddenly and fiercely. You won't find this sensation elsewhere—make it yours today.