... .good fire-resista Name : cavity box /octagonal box 1) Thickness:1.5mm2) Specifications: 4" x 2" , 1-1/2" ... deep or 1-7/8" deep, drawn oct . 4"x4"x2"box , 4 ... insulation property, good combustion-resestant sizes : 4"x2" box , 3x20mm hose in long sides, 1x20mm in short ... . material : pvc , 200pcs for export cartons . octagonal box , sizes : 4"x4", 100pcs for export cartons, 20pakages for ...