Motion Pro Brass Vacuum Adapter With Cap (5mm x P0.80mm) 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.Can be permanently installed on motorcycles that only have a plug in the vacuum port.Eliminates the need to install adapters before every carburetor synchronization.Rubber caps are included to seal vacuum.