Our 3M 1BG Series Filter Housing has a three-piece cast iron / steel design for air and gas applications. The 3M 1BG Series housings have a maximum flow rate of 70 SCFM and are rated to 150 psig at 250oF. The 1BG1 and 1BG2 models hold a single filter cartridge, (4 7/8??and 9 ????long respectively). The housing design and the petcock on the drain allow collection and drainage of condensed fluids.