Sterling Seal & Supply 241 Silicone O-Ring, 70A Durometer, Red, 3-7/8" ID, 4-1/8" OD, 1/8" Width (Pack of 5)

["Made of silicone for use with a variety of chemicals and fluids","Can be used across a wide temperature range from -65 degrees F (-54 degrees C) to 450 degrees F (232 degrees C)","Round in cross-section to provide a seal between cylindrical overlapping surfaces","Durometer (hardness) of 70A for resistance to penetration","Meets standards defined by Aerospace Standard AS568A"]