O'rings: are torus or doughnut shaped rings defined by their Inner Diameter (I.D)& 'Cross Section' (C.S)APPLICATIONS Automotive Fluid Power Electronics Hydraulic Fittings Valves and Pumps Power Generation Instrumentation Filtration Hydraulic Cylinders Plumbing Products Petrochemicals Chemicals & Fertilizer Plants Pharmaceuticals Pneumatic Cylinders Dairy/Food Processing Earthmoving & Construction Equipment