Product details

Gazzew Black Boba U4 Silent Tactile Switch - OZO Keyboards

Gazzew Black Boba U4

Euphoric. Silent. D-Shaped Perfection.

Loved the world over, the Gazzew Boba U4 switches are widely regarded as one of the best silent tactile switches available within the custom keyboard community. Designed by renowned switch designer Gazzew in collaboration with Outemu, the U4 (named for "Euphoria") delivers an exceptional silent tactile experience that challenges every preconception about silent switches. Featuring Gazzew's proprietary Boba housing blend—softer and smoother than nylon for an excellent sound profile—these switches offer a pronounced D-shaped tactile bump with zero pre-travel. Smooth from the factory with minimal scratchiness, the Boba U4 provides the same great tactile typing experience as the acclaimed U4T switches, but whisper-quiet. Perfect for office environments where you need satisfying tactile feedback without disturbing colleagues.

Technical Specifications

Type Silent Tactile
Bottom Out Force 62g or 68g
Tactile Bump Profile D-Shaped (No Pre-Travel)
Mount Type PCB (5-pin)
Top Housing Material Proprietary Boba Blend (Black)
Bottom Housing Material Proprietary Boba Blend (Black)
Stem Material POM (Dampened Long Pole, White)
Spring Type Korean Stainless Steel
Silencing Method Removable Silicone Dampeners
Factory Lubed Spring Bottoms Only
RGB Compatible Clear Top Option Available
Manufacturer Outemu (Gazzew Design)
ThereminGoat Rating 85/100

Sound Profile

Silent Quiet Muted Dampened Office-Friendly

Feel

D-Shaped Bump Euphoric Smooth Non-Mushy Zero Pre-Travel Highly Tactile Minimal Wobble

Compatibility & Design Philosophy

These switches are compatible with most mechanical keyboards that support MX-style switches. The 5-pin PCB mount design ensures exceptional stability, while the tight housing tolerances minimize stem wobble for a premium feel. Gazzew's proprietary Boba housing blend is softer and smoother than standard nylon, producing a unique sound profile while dampening metallic noise. The dampeners are removable—remove them to transform the switch into a milky, clacky tactile similar to Gateron Milky Blacks. The distinctive D-shaped tactile bump offers more tactility than even membrane keyboards, without the mushiness. Available in both standard black housing and RGB-friendly clear top variants, with 62g and 68g spring weight options to suit your preference.

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Same Day Dispatch Orders before 4PM

About OZO Keyboards: As a small UK business, we handle every order ourselves—no drop shipping involved. When you contact us, you'll always be speaking directly to one of the three people who run this business. Every item goes through a quality control check before dispatch.

Specifications

Type: Silent tactile mechanical switch

Mount: 5-pin PCB (MX-style)

Force variants: 62 g & 68 g bottom-out (actuation force ~44-60 g)

Housing: Black boba-plastic (top & bottom)

Stem material: POM

Factory lube: Lightly lubed housing/leaf/spring

Inside the box

Switches

Protective packaging

Compatibility

Fits MX-style keycaps and PCBs with 5-pin support

Ideal for quiet builds, office or shared spaces

Suitable for custom mechanical keyboards requiring premium silent tactility

Warranty

1-year manufacturer’s warranty