Boba Black U4 / U4T Switch: The new model uses a black plastic case, the U4 is a silent tactile switch and the U4T is a thocky tactile switch. Available in both 62g spring and 68g spring configurations.

The new black plastic is very smooth and softer than nylon PA66. Compared with polycarbonate, it has a higher melting temperature (does not affect the smooth surface). The new material makes them smoother than the older white versions of U4 and U4T.

The normal version is compatible with any lamp beads (SMD, four-pin, two-pin lamp beads), and the RGB version is only compatible with SMD lamp beads (SMD). They are compatible with hot-swappable sockets (Kailh & Gateron universal sockets.

The new shrapnel design increases the sense of touch and reduces the noise of the shrapnel (due to the metal composition and the new plastic base), and the light paragraph touch and linear touch are very friendly.

Fit for any keycaps and all stems are compatible with MX housing, letting you pick from the wide variety of available keycaps.