Junction box Thermocouple connection head terminal block insulater, Material:Aluminum, Color: Silver, Type: 2P,3P,4P,6P; KNC Junction BoxFeatures: 1,Used ... ,mainly assorte to basic type and explosion-proof type;2,materials of connection cover :aluinium alloy,stainless steel. ... terminal assorted to 2P,3P,4P,6P. Protection class: IEC529, case class:IP65.3,Models of different material has different ...