An O-Ring is a mechanical seal or gasket in the shape of a torus, O-Rings are usually made from rubber and are used extensively to prevent the loss of air or fluids. O-Rings are available in a wide range of sizes and thicknesses in both metric and imperial dimensions. O-Rings are also available in other materials like FKM-75, Silicone, EPDM and Neoprene. Examples of applications of O-Rings are in pipe fittings, hydraulic pumps, oil gaskets, and automotive motors. O-Rings are widely used in the Semiconductor, Precision Engineering, Oil & Gas, Aerospace, Marine and Automotive Industries.