Upper Cover: High Temperature PBT/NiLong (UL94 V-0) or Spcc
Lower Base: High Temperature Nilong /Bakelite(UL94 V-0)
Actuating stem: High Temperature PBT (UL94 V-0)
Chang Plate: Copper(Plating silver)
Terminals: Brass/Copper(Plating silver)
Sleeve: High Temperature NiLong (UL94 V-0)
Spring: SWC/SUS304