Pneumatic Steel Case Pressure Gauges Bottom Back 40mm 50mm 63mm 1/8" 1/4" BSP
Nominal Size 40mm & 50mm. or tin alloys. Scales HG Outer (Black) & BAR Inner (Red) - Vacuum. Joints Soldered with Tin Alloy. Mounting Options Bottom & Back. highly viscous, high temperature (over 60°C).