Junction box Thermocouple connection head terminal block insulater, Material:Aluminum, Color: Silver, Type: 2P,3P,4P,6P; KNC Junction BoxFeatures: ... :aluinium alloy,stainless steel. Materials of connector:bakelite,ceramics. Connect terminal assorted to 2P,3P,4P,6P. ... industrial control and measurement field, such as machinery, electrical cabinet, power sub-station, industrial automation, etc.. ...