Parker's V1226-75 is a Brown 75-Durometer Fluorocarbon (VitonĀ®, FKM) O-Ring material. V1226 meets AMS-7276 (M83248/1), a specification for Aircraft fuels and lubricant compression set resistance. V1226-75 Fluorocarbon has excellent resistance to high temperatures, ozone, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics and many organic solvents and chemicals. V1226-75 is also a UL listed material.