✔Material: ABS, excellent comprehensive performance,durable and corrosion resistance. | ✔Packing contents : (black)5pcs of cable cover which fit hole size 2".Overall diameter 2.4". | ✔Great for organizing wires and cables which are under 1.5 inches(diameter) on office equipment, computer components, entertainment systems. | ✔Easy Installation: after drilling,place the main body of the grommet directly into the hole,it can hide all the cables and wires. | ✔100% Satisfying Service: 1 year warranty. If you're not satisfied or receive a defective product, please contact us immediately to ask for a new replacement (NO RETURN REQUIRED). HYCC is willing to resend you a new one for replace products with defects in material and workmanship although Amazon's return window has been closed.