The Reinz O-Ring - 407332500 is a sealing ring made from high-quality materials designed to create a tight seal between two surfaces. It is commonly used in automotive and industrial applications to prevent leaks and maintain pressure. This O-ring has a diameter of 40.7mm and is suitable for various types of fluids, including oil, water, and air. It is a durable and reliable product that can withstand high temperatures and pressure.