Full Specifications
| Switch Type | Tactile |
| Stem Material | POM |
| Housing Material | Nylon |
| Spring Type | 22awg gold-plated |
| Factory Lubed | Unlubed |
| PCB Compatibility | 5-pin (PCB Mount) |
| Actuation Force | 67g |
| Bottom-Out Force | 80g |
| Pre-Travel | 2mm |
| Total Travel | 4mm |
| Sound Profile | Thocky Tactile |
| Price | $5.50 per 10 switches |
Editorial Review
The Gazzew Boba U4T has earned a permanent spot at the top of the tactile switch conversation, and for good reason. Designed by Gazzew and manufactured by Outemu, the U4T is widely stocked by vendors like KeebsForAll, NovelKeys, and Thock King, and delivers a pronounced, tactile experience that places it squarely in the heavy hitter category. The bump is sharp, starts high on the travel, and gives you immediate feedback on every keystroke. This is not a subtle tactile — it is an assertive one.
Sound-wise, the U4T produces a satisfying thock that sets it apart from most tactiles in its price range. The Nylon housing contributes a lower-frequency resonance while the POM stem glides through its travel with minimal scratch. Out of the box, the U4T is one of the cleanest-feeling unlubed switches you can buy. The tolerances are tight enough that most users report little to no stem wobble even without films.
For lubing, the community consensus leans toward a thin coat of Krytox 205g0 on the legs only — applying lube to the bump itself will dull the tactility that makes this switch worth buying in the first place. If you want maximum tactility, leave the legs bone dry and just lube the spring to eliminate ping. A thin application of 3203 is also a popular choice for those who want a slightly smoother experience without sacrificing the bump.
Films are generally not necessary on U4Ts due to the tight housing tolerances, but some users add IXPE or TX films for marginally tighter sound. The switch is a 5-pin PCB mount, so you will need a compatible board or to clip the PCB pins for 3-pin use.
Who is the Boba U4T for? If you type for long sessions, love a strong tactile that communicates precisely when a keypress registers, and want a sound profile that is more thock than clack, this is your switch. Gamers who prefer tactiles over linears will also find the consistent feedback useful. The U4T competes directly with the Holy Panda X and Durock T1 but often wins on value. At $5.50 per 10, it is a rare case where premium feel and accessible price coexist without compromise.
Best Keyboards For These Switches
GMMK Pro
Gasket-mounted aluminum board that amplifies the U4T thock beautifully.
Keychron Q3
Hot-swap gasket mount TKL — ideal pairing for U4T tactility.
Satisfaction75
Premium brass-weight board that rewards the U4T sound signature.
Similar Switches
Where This Switch Fits
At 67g/80g actuation-to-bottom-out, the Boba U4T is one of the heaviest tactiles on this list, matched closely by the Holy Panda X (also 67g actuation, but a steeper 90g bottom-out) and outweighing the Durock T1's identical 67g/80g numbers only in housing material rather than spring weight. Its POM stem in a Nylon housing is the key difference from its own dampened sibling, the Boba U4 (UHMWPE stem, silicone dampeners) — the U4T keeps the sharp, undampened bump that makes it read as genuinely "Thocky Tactile" rather than quiet.
Against the Durock T1, its closest direct spec match, the U4T's Gazzew-designed bump profile is generally considered sharper and more precisely located in the stroke, while the T1 is the more budget-accessible option at $3.50 versus the U4T's $5.50. For buyers who've already ruled out silent tactiles and want the heaviest, most pronounced bump available on this list short of a boutique option, the U4T and Holy Panda X are the two switches worth comparing most directly.