wiring duct Material: High impact,self-extinguishing,warp-proof PVC. Maximum service temperature: 85 Used extensively for all wiring applications where cable protection is essentiali.e. switchboards...etc. Features parallel holes on both sidewalls to facility cutting in wire application.Special color, size, length upon request of reasonable quantity. Various sizes available (from 20 x 15 and 20 x 20 up to 100 x 80 and 100 x 100) !