Thermocouple Head 1. Material: Alloy-Aluminum 2. Weight:280g Thermocouple Head: Material: Alloy-Aluminum, KNC Weight 280g.Protection Tube Entry:PF1/2", PF3/4", NPT1/2", NPT3/4", BSP1/2", BSP3/4", M20X1.5Extension Wire Entry:PF1/2", PF3/4", NPT1/2", NPT3/4", BSP1/2", BSP3/4", M20X1.5 Thermocouple Heads (KNC)