20 x 28 x 5.7 U Cup Seal

Harwal 20 x 28 x 5.7mm U45 polyurethane U-cup seal with 20mm ID, 28mm OD, and 5.7mm width. Made from 90 Shore A polyurethane for reciprocating hydraulic and pneumatic cylinders. Flexible U-shaped lips provide dependable pressure sealing and resist wear, extrusion, oils, and common industrial fluids.