The Keygeek Keylin linear switch is designed by YG, the designer of HMX Macchiato and Canglan V2 switches, and manufactured by Keygeek. Although it has a UPE stem and PA66 bottom housing, it doesn't sound too deep or muted. Overall, the Keylin switches have a thocky and medium-clack sound profile. The reason is that the UPE stem is made with a strengthened UPE blend, and the PA66 bottom housing comes with fiberglass added. The PA12 top housing ensures great smoothness. With the improvements in molding and factory lubing Keygeek implemented during the past few months, new Keygeek switches now come with a more solid and clean sound profile, maximum smoothness, and precise factory lube application. 1 quantity = 10 switches  Switch Type: Linear Manufacturer: Keygeek Designer: YG Stem material: U4 (Modified UPE) Sphere stem pole tip Top Housing: PA12 Bottom Housing: PA66 with fiberglass Operating Force: 38±5g Bottom-out Force: 48±5g Pre-travel: 2.0mm±0.2 Total Travel: 3.6mm±0.2 Spring: 21mm single-stage spring Japanese wire Factory Lubed: Yes!