Material: Rubber rubber grommets with uniform wall thickness, strong tensile strength and good toughness. Sealing rings with high electrical resistance fit precisely and effectively in drill holes. Rubber seals organized in a transparent box, suitable for storage and removal. Set of rubber cable grommets designed to be heat-resistant, oil-resistant, and wear-resistant. Each grommet features a thin rubber membrane in the center that can be punctured to create a custom opening. Rubber sealing rings are ideal for electrical repairs, preventing metal-to-metal contact, and replacing worn or damaged grommets in taps, pipes, and similar applications. The rubber gasket set includes 7 common sizes: 50 pcs 7.14mm, 40 pcs 9.53mm, 30 pcs 12.07mm, 20 pcs 15.88mm, 10 pcs 19.05mm, 10 pcs 22.23mm, and 10 pcs 25.40mm. Made from high-quality rubber material, these grommets are flexible, durable, and provide excellent electrical resistance. The o-rings fit snugly and securely. Designed for easy installation with snap-on mounting, these rubber grommets are used in holes in metal plates or other materials to protect cables, wires, and cords from mechanical or chemical damage, while providing a clean, finished appearance to furniture and electrical enclosures. Essential rubber sealing rings for automotive, RV, marine, plumbing, and wiring applications, as well as for pipe repair and leak prevention. A practical tool kit for electricians, plumbers, repair shops, movers, and home renovation projects. Specifications: Material: Rubber Color: Black Temperature Range: -40C to +100C (briefly up to -50C to +150C) Package includes: 170 rubber grommets in 7 different sizes Note: Measurements are manually taken; please allow 13 cm variance. Due to lighting and display differences, slight color variations may occur. Actual product may vary slightly from images.