Applications: Brake seals; Hydraulic cylinder seals Compatible With: Ozone; Petroleum base lubricants and hydraulic fluids/fuels; UV light Temperature (°F): -40 - 200 Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image. Not Compatible With: Water; Water base hydraulic fluids Cross Section Diameter (in): 0.138 Inside Diameter (in): 1.248 Outside Diameter (in): 1.524 Hardness (Shore A): 90 Material: PU (Polyurethane) Material Description: Polyurethane O-rings are typically used in applications requiring high pressures or abrasion resistance. Coating: None Color Notes: Actual o-ring color may differ from image.