10 x 21 x 4.5 U Cup Seal

Harwal 10 x 21 x 4.5mm U45 polyurethane U-cup seal with 10mm ID, 21mm OD, and 4.5mm 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.