... , OEM Service; Pressure Gauge:1. Type: Liquid filled pressure gauges2. Case sizes: 1.5'', 2'', 2.5'', 3'', 4'' and 6 inches ... or without liquid, glycerine., silicone oil6. Connection: 1/8, 1/4, 3/8, 1/2, inches BSP, NPT or BSPT7. Type ... Letter Need);12. Packaging: Small White Box; Oil Filled Pressure Gauge