Product material: made of rigid PVC with Halogen-free, environmental protection and Pollution-free, non-toxic lead.Certification: RoHSFire rating: UL94V-0Low smoke, Halogen-free, not burn with fire, fire resistance and good insulation Product structure: two part including U type duct bottom & duct cover . Both sides of duct have slot holes for cable outletColor: GrayOperating temperature: -25 to constant high temperature +75 , instantaneously can be +85 Use: firstly fixed the bottom duct, put the cable in it & guaid to the slot hole, finally put the cover Features:1.split slot hole, square locked design for duct cover & duct body , combined together firmly & smoothly, safe for hand assemble & wont damage the cable2.no rupture, deformation, discoloration under +70, easy & quick assembe3.Low outlet hole, easy combination , simple disassembly and easy wiring.Note: Unit lengths can be customized as per your requirment