... like metal pipe,resistant to acids,alkali and oil 2) octagonal box with no smell attracting.good fire-resista Name : cavity ... box /octagonal box 1) Thickness:1.5mm2) Specifications: 4" x 2" , 1 ... sides, 2x20mm in bottom . material : pvc , 200pcs for export cartons . octagonal box , sizes : 4"x4", 100pcs for export cartons, 20pakages for ...