Our Air Tapper II goes one step further than our Air Tapper I by providing a gauge that allows the user to see the fill speed and pressure while filling. The Air Tapper II utilizes the industry's standard toggle valve that allows filling when the lever is depressed and automatically shuts off flow and vents the fill line when the knob is released. This fill station is designed to be used with a regulated source of air pressure either 3000 or 4500 PSI. Inlet connection is located at the rear of the unit and the fill line is located on the left side when facing the unit. Air Tapper II comes complete with an 18 inch fill hose with our standard stainless steel Q.D. CON-0982. We also offer an optional safety Q.D. SC-18.