Description This is helpful if you are trying to move air in a big bottle to a smaller more portable bottle, to get a SCBA tank filled, to move air from one tank to PCP air gun or paintball. Simply connect each fill adaptor to the female and male thread air tool fittings, a paintball tank fitting. Feature - Material: Stainless steel - Size: 8mm female plug, 1/8 inch NPT inner male thread, 25.4mm/1 inch length. - Type: Female fill plug quick disconnect to male thread. - Working Pressure: 4500psi - Max Pressure Control: 5000psi Package 1x 8mm female plug to 1/8 inch NPT male thread adapter