Unused 500 GPM 316L Stainless Steel biodiesel unloading cartridge filter. Built by ESS. Carbon steel shell and 316L stainless steel internals. 5-micron filtration, rated 160 PSIG/FV @ 160°F. Clean and dirty differential pressures 5 PSI and 15 PSI, respectively. 24"OD. Estimated weight of 1,000 lbs. Tag #18-FD-1832. Previously designated as Spur 3 Bio-Diesel Blend Component Unloading Filter.