Thermocouple Head 1. Material: Alloy-Aluminum 2. Weight:148g Thermocouple Head: Material: Alloy-Aluminum, KSC Weight 148g.Protection Tube Entry:PF1/2", PF1/4", BSP1/2", BSP1/4", BSP1/8"Extension Wire Entry:PF3/8", BSP3/8", NPT3/8", M16X1.5 Thermocouple Heads (KSC)