[Key Use] - Seals for aircraft engines, automotive fuel handling systems, high temperature/low compression set applications, chemical exposure situations, etc. uxcell Silicone O-Ring, 50mm Outside Diameter, 43mm Inner Diameter 43mm OD 40mm ID O-ring Uxcell O-Rings Nitrile Rubber 43mm Inner Diameter 46mm OD 1.5mm Width Round Seal Gasket 25 Pcs FKM O-rings This O-ring is made of Fluorine Rubber, is round in cross-section, and is ... 400 Pcs Hydraulic O-Ring Flat Face Fittings 9 Size Buna-N 70A O Rings Seal Kit f... [Heat Resistant] - Can be used across a wide temperature range from -4 degrees F(-20 degrees C) to 482 degrees F(250 degrees C). uxcell Nitrile Rubber O-Rings 47mm OD 44mm ID 1.5mm Width, Metric Nitrile Rubber Sealing Gasket for Automotive Machine Plumbing, Pack of 10 [Size] - Outer Diameter: 43mm / 1., 69; Inner Diameter: 40mm / 1., 57; Cross-Section Diameter: 1., 5mm / 0., 06.