... Accuracy:+-1.6% Diameter:40mm,50mm,63mm,100mm Vacuum pressure Gauge Diameter:YZ-40 11/2YZ-50 2YZ-63 21/2 ... -150 6Accuracy: ±1.6%Measure range: -0.1Mpa~2.5MpaScrew thread :1/8 1/4 3/8 1/2 NPT BSPTBSPM10 ... :Bottom connection,Back connection, Back connection with border. vacuum pressure gauge