Feature: 1. The installation is simple and flexible, usually used for sealing, such as shaft seal, hole seal, dust seal, oil seal, water seal, etc. 2. Good sealing damping effect, suitable for the general maintenance of automotive, aerospace equipment, construction machinery, water pipe facilities, faucets, electrical appliances, bearings, cylinders, pumps, valves and other mechanical equipment. 3. Corrosion resistance, high pressure resistance, high temperature resistance, wear resistance. 4. Can be used to prevent leakage in piping, hydraulic, air and gas connections. 5. After many inspections before leaving the factory, the quality of this O-ring assortment kit is guaranteed. Specification: Condition: 100% Brand New Item Type: O-Ring Material: Rubber Color: Black Size: Approx.22.5x10.5x3cm/8.9x4.1x1.2in Weight: Approx.186g/6.6oz Application: Used for the general maintenance of automobile, aerospace equipment, construction machinery, water pipe facilities, faucets, electrical appliances, bearings, cylinders, pumps, valves and other mechanical equipment Model: 20pcs: 3x1.5mm / 0.1x0.1in 10pcs: 20.6x2.38mm / 0.8x0.1in 22pcs: 4.4x2mm / 0.2x0.1in 10pcs: 20.6x3.17mm / 0.8x0.1in 22pcs: 7x1.5mm / 0.3x0.1in 8pcs: 22.22x3.17mm / 0.9x0.1in 20pcs: 11.1x2.38mm / 0.4x0.1in 8pcs: 23.8x3.17mm / 0.9x0.1in 20pcs: 12.7x2.38mm / 0.5x0.1in 8pcs: 25.4x3.17mm / 1.0x0.1in 20pcs: 14.28x3.38mm / 0.6x0.1in 8pcs: 28.57x3.17mm / 1.1x0.1in 10pcs: 15.8x2.38mm / 0.6x0.1in 8pcs: 30.7x3.17mm / 1.2x0.1in 10pcs: 17.46x2.38mm / 0.7x0.1in 8pcs: 31.7x3.17mm / 1.2x0.1in 10pcs: 19.05x2.38mm / 0.8x0.1in Weight: Approx.186g/6.6oz. Package List: 20pcs 3x1.5mm 22pcs 4.4x2mm 22pcs 7x1.5mm 20pcs 11.1x2.38mm 20pcs 12.7x2.38mm 20pcs 14.28x3.38mm 10pcs 15.8x2.38mm 10pcs 17.46x2.38mm 10pcs19.05x2.38mm 10pcs 20.6x2.38mm 10pcs 20.6x3.17mm 8pcs 22.22x3.17mm 8pcs 23.8x3.17mm 8pcs 25.4x3.17mm 8pcs 28.57x3.17mm 8pcs 30.7x3.17mm 8pcs 31.7x3.17mm Note: 1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.