3 square grommets: You will receive 3 black square grommets. Two sizes: square cover 80 x 80 x 28 mm, required drilling size: 68mm x 68mm; rectangular 160mm x 80mm x 28mm, required drilling size: 148 x 68mm. Aluminum alloy material: The cable connector cover is made of aluminum alloy and is fixed on the inner wall. Structural design: clamshell design, simple structure, curved cover, corrugated internal structure design, exquisite and beautiful. Wide range of applications: suitable for desks, TV cabinets, computer desks, etc., easy to install, helping you create a cleaner workspace. luckymeet Note: Due to manual measurement, the size may have an error of 2 cm/1 inch; Due to different displays and angles, the color and size may be slightly different, please understand! Welcome to your purchase! We look forward to showing you your shopping experience.