2-piece cable passage 160 mm x 80 mm x 28 mm, required hole: 148mm x 68mm, cable gland also ideal for use in worktops, desks, office tables, etc.High quality nylon brush prevents dust ingress , reduces friction, prevents abrasion, protects the wires from damage and offers great flexibility, and the brush is not easy to lose.Made of strong, sturdy and durable aluminum alloy , high temperature resistant, anti-aging, multiple protection, curved aluminum alloy shell, safe and reliable.The ribbed interior design is exquisite and beautiful, giving a high quality feeling. The edge is worked diagonally down to get closer to the table.The screw connection uses a galvanized Phillips screw connection, waterproof and moisture resistant, long life, stronger and more reliable .