Made of sturdy aluminum alloy, sturdy and durable, high temperature resistant, anti-aging, multiple protection, aluminum alloy curved shell, safe and reliable. The nylon brush high quality prevents dust ingress, reduces friction, prevents abrasion, protects threads from damage, and provides great flexibility. The screw fitting uses a galvanized Phillips screw fitting, waterproof and moisture-proof, long service life, more sturdy and reliable. The ribbed interior design is exquisite and beautiful, giving a high-grade feeling. The edge is worked diagonally downwards to be closer to the table. Cable passage Material: aluminum alloy. Color: black . Dimensions: 80 x 80 x 28 mm. Dimensions of the holes required: 68 x 68 mm. The situations in which you will need the cable management: If you want your desk to have holes to pass the wires. Contents: 2 cable grommets