Sterling Seal Supply 330 VitonFKM ORing 75A Durometer Black 218 ID 212 OD 316 Width Pack of 5

Made of Viton (fluorocarbon elastomer) for use with a variety of chemicals and fuels, Round cross-section to provide a seal between cylindrical overlapping surfaces, Can be used across a wide temperature range from -15 degrees F (-26 degrees C) to 400 degrees F (205 degrees C), Durometer (hardness) of 75A for resistance to penetration, Meets standards defined by Aerospace Standard AS568A