Brand : SP-Star Switch Mount : 5-pin (PCB Mount) Switch Type : Linear Bottom Out Force : 50g Actuation Force : 45g Actuation Travel : 2mm Total Travel : 3.5mm Top Housing : Polycarbonate (PC) - White Stem : LY - White Bottom Housing : Nylon - White Lube : Lubed (Factory Lube) These SP-Star Arctic White switches feature Polycarbonate top housing, long pole LY stem, and Nylon bottom housing. It also has less spring and leaf ping than competing switches.