|CAH 0930 Compressed Air Housings 2-1/2" Connection Size (930 cfm rating). Filters are suitable for all common mineral and synthetic oils. Pressure gauge indicators standard for all models except housing number CAH0058, which uses a pop-up style indicator. Housing Dimensions(inches) 9.25 X 32.12. Select filter with housing or filter housing only. Filters are available in P-Particulate, X-General Purpose, Y-Oil Removal, and A-Odor Removal Adsorber grades.