MANOSTAR GAUGE TYPE WO81 , Air only. wo81FT 500 D , range 0-500 pa , wo81FT 300 D , range 0-300 pa, wo81FT 1000 D , range 0-1000 pa
Manostar Differential Pressure Gauge wo81FT 500 D , range 0-500 pa , W081FT 300 D 0-300 pa, WO81FT 1000 D , 0-1000 pa
