The SIMRIZ SZ481 O-Ring, conforming to AS568-345 specifications, has a 4" inner diameter, 4-3/8" outer diameter, and a 3/16" cross-section. This O-ring is made from high-quality materials designed for durability and resistance to various chemicals, making it suitable for a wide range of applications in the automotive and industrial sectors. Its precise dimensions ensure a perfect fit, providing effective sealing and preventing leaks. This product is ideal for engineers looking for reliable sealing solutions that meet industry standards.