The rubber construction grommets are non-flammable, weather-resistant, also less affected by the negative effects of and ozone, high heat resistance, more and tear-resistant, it does not dry up or crack and come lose easily, grommets are more resistant to , phosphoric, , sulfuric and saltpeter , it can also handle bigger temperature than other types of grommets. Features - Color: Black. - Material: Rubber. - Size: 20.00 x 10.50 x 3.00cm/ 7.86 x 4.13 x 1.18 inch. - The 200 pcs sealing rings are fitted with a box, store separately according to different sizes, easy to carry and store. It's not scattered all over the place. - This sealing ring is convenient and flexible, , easy to install. - These rings are resistant, corrosion resistance, high temperature resistance, wear resistance, and ultra thick wall designed for long term use. - Use for wall hole,workshops, plumbing services, wires, cable, firewall, spray, cylinder, valve,automotive, car, pump, electrical appliance, chemical , water , etc. - Different sizes rubber grommets, essential for automotive, boat and wiring, and repair jobs. Package list: 200 rings