... )Connection size: 1/8" 1/4" 1/2" 3)CE Certificate General Pressure Gauges 5J2 are high quality dry gauges design to provide reliableservice ... .MOVEMENT:Brass, stainless steelCONNECTION:1/8", 1/4", 1/2", 3/8", NPT, BSP or BSPT dependent on model & size. Bottom, backleft & ... .MOVEMENT:Brass, stainless steelCONNECTION:1/8", 1/4", 1/2", 3/8", NPT, BSP or BSPT dependent on model & size. Bottom, backleft & ...