... EN 60947-1:l2007 (CLAUSE 7.3,8.4), class of fire proofing, little smoke and halogen ... encounter fire, good in fireproofing and insulatio Wiring Duct RoHSMaterial:Made from hard PVC, low halogen material ... of standing high temperature Struction: Made up of duct bottom and lidFeature: be made of bottom ... , easy combination, take down simply, easy wiring,4,no thread hole and airproof, dust protecting, mouse ...