Motion Pro is dedicated to producing the most versatile, unique and durable products for professional and home use. Motion Pro tools are designed to be simple to use, yet durable enough to withstand the harshest conditions. One of their goals is to offer tools of convenience. Do it right the first time with Motion Pro Tools. The Quick Disconnect Coupler seperates with the press of a button. Female side stops flow from the tank. The special, fuel-rated Viton O-rings used won't deteriorate and leak with pump or racing gas. Available in 5/16" or 1/4".