The Reinz O-Ring - 401006100 is a small circular seal made of durable rubber material. It is designed to fit into a specific groove or recess in a mechanical component, creating a tight and reliable seal to prevent leakage of fluids or gases. This O-ring is commonly used in automotive, industrial, and household applications. It has a diameter of 40mm and a thickness of 10mm, making it suitable for various sealing needs. The Reinz O-Ring - 401006100 is a high-quality product that is resistant to heat, pressure, and chemical exposure, ensuring long-lasting performance.