This black elliptical EPDM gasket for boilers and access covers is made of ethylene propylene diene monomer (EPDM), giving it high elasticity and resistance to abrasion and impact forces. It has a maximum working pressure of 180 psi, a working temperature range of -55 to +380 degrees F (-48 to +193 degrees C), and is compatible with fireproof hydraulic fluids, ketones, hot and cold water, and alkalis. This black elliptical EPDM gasket is suitable for applications requiring heat, ozone, and weather resistance.