Freudenberg-NOK's O-Ring, with a diameter of 5.850" and a cross-section of 0.210", is made from premium VMQ silicone rubber rated at 70 hardness. This O-Ring is engineered for superior sealing performance, making it suitable for a variety of applications, including automotive and industrial uses. Its material properties provide excellent resistance to extreme temperatures and chemicals, ensuring compliance with industry standards for reliability and compatibility. The SI70A4 designation signifies its high-quality formulation.