Oil-free Not available External copper system Fluid d: Air Pressure range (MPa): 0 to 0.7 Nominal: Pressure gauge Shape: Back screw type Outer diameter (mm): 57 Measurement fluid: Air Connection size: R1/4 (02M = M5 female thread included) Model:背螺钉类型 适用的管外直径D(mm):57 分辨率准确性(%fs):±3 附件:无透明的盖子突出(无法删除透明的盖子)