225-Piece Rubber O-Ring Assortment with Case Commercial-grade rubber material provides excellent resistance to heat, mineral oils, and wear. 225-piece O-ring assortment comes in a sturdy plastic case. Ideal for garages, workshops, bearings, pumps, electrical appliances, cars, doors, windows, mechanics, plumbers, etc. The case provides clean storage and safe transport, saving you time and effort. 18 different sizes will satisfy almost all your needs. 18 sizes, 225 pieces: 20 pieces 3x1/20 pieces 4x1/20 pieces 4.5x2/20 pieces 5x2/20 pieces 6x2/20 pieces 6x2.5; 20pcs 6x3/20pcs 7x2/20pcs 8x2/5pcs 9x2/5pcs 10x2/5pcs 12x3; 5pcs 13x3/5pcs 14x2.5/5pcs 17x2.5/5pcs 18x4/5pcs 20x2/5pcs 22x2. Practical Tool These are used to prevent lines, wires, and cables from scratching or scraping rough surfaces. They can also effectively reduce vibration and are used for sealing other important applications under the hood and on the body. Assorted Model 225 pieces, 18 popular sizes. The O-ring sealing washer set meets almost all your needs, with paper markings for sizes, making it easier to identify the size you need. The ultimate flexibility: Soft and flexible O-ring, easy to attach, easy to install, very suitable for sealing gasoline, diesel, lubricating oil, water, air, gas, and various chemicals.