①. Material: Rubber grommets with uniform wall thickness, strong tensile strength and good toughness. Sealing rings with high electrical resistance fit precisely and effectively in these drill holes. ②. Organized in a box: Packed in a transparent box, which is suitable for storage and removal. ③. Features: The rubber grommets are heat-resistant, oil-resistant, wear-resistant and practical and handy. There is a thin rubber membrane in the middle that can be punctured to make an opening. ④. Application: Rubber sealing ring can be used for electrical repairs, prevents metal to metal contact and replaces worn grommets or broken ones in taps, pipes, etc. Rubber grommets are designed for easy installation with snap-on mounting holes, metal plates. Usually used in holes in metal plates or other materials to protect cables, wires, cords from possible mechanical or chemical attack and give a neat look to furniture, electrical boxes. Must-have rubber sealing rings for automobiles, RV wiring work, marine applications, leaking fittings, pipe repair, etc., a good tool kit for repair shops, electricians, movers, home renovation, plumbers, etc. ⑤. Specification: Color: Black; Temperature Range: -40°C to +100°C (briefly -50°C to +150°C). ⑥. Scope of delivery: The rubber gasket set contains 7 common sizes: 50pcs 7.14mm / 40pcs 9.53mm / 30pcs 12.07mm / 20pcs 15.88mm / 10pcs 19.05mm / 10pcs 22.23mm / 10pcs 25.40mm. ⑦. Package Details: 170 rubber grommets in 7 different sizes. ⑧. Note: The data are all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received.