SpinFit CP155 M Silicone Eartips for 6–7mm Nozzles

SpinFit CP155 M are patented swivel silicone eartips designed to fit wide, long IEM nozzles (6–7 mm) and deliver secure comfort and reliable sound isolation in a medium size.

These replacement eartips from SpinFit are engineered to accommodate earphones with larger soundport nozzles while preserving natural audio tuning and improving wearing comfort. Each CP155 M tip uses a flexible, rotating stem that adapts to ear canal angle, helping reduce pressure and maintain seal without reshaping the earbud housing. The package contains two pairs (four pieces), each with a 5.5 mm bore that pairs best with nozzle diameters between 6 and 7 mm.

How do SpinFit CP155 M tips improve fit and comfort?

The CP155 M combines a soft silicone body with a swiveling nozzle sleeve that adjusts to your ear’s angle, minimizing hotspots and slippage. The swivel action keeps the tip aligned for longer listening sessions and makes insertion easier without forcing the ear canal.

• Swiveling stem conforms to ear canal angle for improved comfort.
• Medium size built for larger, longer nozzles and deeper insertion.
• Soft, skin-friendly silicone reduces irritation over extended wear.
• Reusable and easier to clean than foam alternatives.

Will these eartips work with my IEMs that have 6–7 mm nozzles?

Yes — the CP155 M was made specifically for soundports in the 6–7 mm range; the internal bore diameter is 5.5 mm to ensure a proper acoustic path. They mount securely on most wide or long nozzle designs without blocking the soundport or altering the earphone’s intended voicing.

• Compatible nozzle diameter: 6 mm to 7 mm.
• Internal bore: 5.5 mm for clear sound transmission.
• Works with many popular IEMs and aftermarket nozzle shapes.
• Easy to attach and remove for swapping or cleaning.

How do CP155 M eartips affect sound and isolation?

Because the bore is sized to keep the sound channel unobstructed, the CP155 M preserves the tonal balance of your earphones while the silicone body creates a reliable seal. You’ll notice reduced outside noise and improved bass presence without muffling high frequencies.

• Maintains original audio signature thanks to a direct bore path.
• Enhanced passive isolation reduces ambient noise intrusion.
• Improved bass clarity through a secure seal in the ear canal.
• Less resonant coloration compared with thicker foam tips.

What practical benefits do these replaceable tips offer?

SpinFit CP155 M tips are durable, washable, and designed for repeated use, making them a cost-effective replacement for worn or uncomfortable stock tips. Their resilient silicone resists tearing and holds shape longer than many foam alternatives.

• Sold as two pairs (four pieces) so you have spares on hand.
• Silicone construction cleans easily with mild soap and water.
• More durable than typical foam tips, reducing replacement frequency.
• Compact and travel-friendly for carrying backups.

Who is this for: The SpinFit CP155 M is intended for listeners who own IEMs with wider or longer nozzles (6–7 mm) and want a medium-size eartip that balances comfort, sound fidelity, and longevity. It’s ideal for commuters, studio users, and audiophiles seeking a stable seal without altering their earphones’ voicing, and for anyone who prefers silicone’s low-maintenance durability over foam.