1/2'' NPT (M) x G 1/2'' (F) Stainless Steel Reducer for Pressure Gauge | Tameson.co.uk
Vacuum Pressure Gauge, 2" Dial, 1/4"NPT Bottom Mount, Dual Scale -30inHg to 0/-1 to 0 Bar, Copper Alloy, +/- 4/3/4% Accuracy, for Air Compressor Water Oil Gas : Amazon.co.uk: Business, Industry & Science