Seal/O-Ring Type: Split Material: PTFE - Polytetrafluoroethylene Material Description: PTFE provides superior performance in Air, Engine Oil, Diesel Fuel and Coolant applications, but is sensitive to installation damage and debris. It works well at very high temperatures. Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image. Inside Diameter (in): 0.79 Cross Section Width (in): 0.05 Cross Section Height (in): 0.08