Hydraulic Tank Desiccant Breather Micron Rating 3 Overall Length 9 in Outside Dia 4.0 in Max Operating Temp 250 Degrees F Inlet Size 1 in NPT Max Pressure 5 psi Efficiency 98.7 Percent @ 3 Micron Mounting Style - Breathers Screw-In For Use With All Hydraulic Reservoirs