Specifications:Color: RedMaterial: SiliconeOuter Diameter: 5mm / 0.2"Inner Diameter: 3mm / 0.12"Cross-Section Diameter: 1mm / 0.04"Package Contents:30 x Silicone O RingsDescriptions:1. Durometer: Round shape silicone O-ring, has a durometer of 50, and is designed for use in a wide variety of sealing applications.2. Working Temperature Range: This silicone O-ring can be used across a wide temperature range from -22 (-30) to 392 (200).3. Usage: O-rings commonly provide a pressure and fluid seal between cylindrical shaped, overlapping mating surfaces and are commonly seen in engines, , flanges, valves, and various cylinders.4. Feature: This silicone O-ring has good resistance to , weather, , salt , engine and transmission oil, non-petroleum brake fluid, hydraulic fluids that resist , and oils, and high molecular weight . It is an ideal solution for sealing application where there are high temperatures and corrosive liquids or gases involved.5. Applications: Used widely for mechanical sealing, gas compressor, heat exchanger, boiler, filter, automobile, electrical appliance and other fields.