Features Made of commercial grade nitrile rubber (NBR) material to resist UV rays, lubricants and greases. Suitable for domestic, hydraulic, industrial and pneumatic applications. Double O-ring seal seals and prevents water leakage in faucets, sinks, filters and machinery. There are a variety of O-rings in plastic storage boxes with dividers and lid. Soft rubber construction improves durability for extended use in static and dynamic cylinder fittings. Specification: Item type: O-ring Shape:Ring Material: Rubber Package List:20PZS 5.3x1.78mm O-Ring 20PZS 6.0x1.78mm O-ring 20PZS 6.8x1.9mm O-ring 20PZS 7.6x1.78mm O-ring 20PZS 7.8x1.9mm O-ring 20PZS 8x2mm O-ring 20PZS 8.8x1.9mm O-ring 15PCS 10.8x1.78mm O-Ring 15PCS 10.8x2.62mm O-Ring 15PCS 11x2mm O-ring 15PCS 12x2mm O-ring 10PCS 13.9x1.8mm O-Ring 10PCS 13.9x2.62mm O-Ring 10PCS 14x2mm O-Ring 10PCS 15x2mm O-ring 10PCS 17x2mm O-ring 10PCS 17.2x1.77mm O-ring 10 x 17 x 3.5 mm O-rings Package List 20PCS 5.29x1.78 mm O-Ring 20PCS 6.07x1.78 mm O-Ring 20PCS 6.8x1.9 mm O-Ring 20PCS 7.65x1.78 mm O-Ring 20PCS 7.8x1.9 mm O-Ring 20PCS 8x2 mm O-Ring 20PCS 8.8x1.9 mm O-Ring 15PCS 10.82x1.78 mm O-Ring 15PCS 10.77x2.62 mm O-Ring 15PCS 11x2 mm O-Ring 15PCS 12x2 mm O-Ring 10PCS 13.9x1.8 mm O-Ring 10PCS 13.95x2.62 mm O-Ring 10PCS 14x2 mm O-Ring 10PCS 15x2 mm O-Ring 10PCS 17x2 mm O-Ring 10PCS 17.17x1.78 mm O-Ring 10PCS 17.04x3.53 mm O-Ring