... halogen material, rigidity PVC, environment protecting, no pollution, no lead, no venomous matter. Work temperature: -25degree-75degree ... combination, take down simply, easy wiring,4,no thread hole and airproof, dust protecting, mouse protecting, suit to construction and factory. Item.NO ... .WXH(mm)Item.NO.WXH(mm)PXC-152015x20PXC-305030x50PXC-202020x20PXC- ...