Gauge Twin Clip-On Open 9ft Hose - AFG4H06 New and improved version of the highly regarded MK3 tyre inflator. Open End = Unvalved (air straight through) Hold On = Hold onto valve to inflate Clip On = Clip slides down to hold onto valve to inflate Calibrated 45 to 300 lbf/in2 and 3 to 21 bar Supplied with a certificate of calibration