Cim-Tek 70018 (300MB-30) Filter, Maximum Working Pressure 50 PSI, Microglass Media, 30 &mu;m, 25 GPM, 1" NPT Particulate removal for industrial in-plant equipment, lube systems and return line hydraulic systems Phase Separation Monitor Filter, ABSOLUTE RATED. Compatible with lube oils, gear oils, and synthetic fluids Equivalent to OEM filters Microglass High-Performance Media last 2 to 3 times longer than cellulose media is highly efficient and has a high dirt-holding capacity Longer filter life with extended length filters