These are the new Ruby switches from Tecsee, featuring a PC mix shell, a long pole linear POM stem and a 63.5g gold plated progressive spring. they come very lightly lubricated from the factory and Tecsee has confirmed that they can be safely lubricated without the need to clean them.

• This model is compatible with the keyboards: QwertyKey61, RK61, RK837, GamaKay K87, GamaKay K66, Keychron K2, K4, C1 and all 5-pin hotswap keyboards.
• Brand: TECSEE
• Style: Linear
• They come pre-lubricated from the factory.
• Operation: 2mm
• Full travel: 3.5mm
• Pressing force: 52g
• 63.6g bottom out
• STEM Material: POM
• Material housing: PME
• Double gold bow 63.5g
• Plate mount (5 pins).
• Compatibility with LEDs on the switch: SMD and hole for led.