The Sealco 320100 Two Way Check Valve is a new old stock product designed for use in hydraulics, pneumatics, pumps, and plumbing systems. With a 3/8 inch NPT size, this valve is ideal for controlling the flow of fluids and ensuring a smooth operation in various industrial applications. The Sealco brand is known for producing reliable and durable valves, making this product a valuable addition to any business or industrial setting requiring precise fluid control.