Whitmore Air Sentry Model: XR-508 Dimension: 5.25'' DIA x 14'' TALL 2'' MNPT   Specifications: Check Valve PSI In/Out: 0.1 0.1 Height: 14 in 35.6 cm Diameter: 5.2 in 13.2 cm Mounting Connection: 2" MNPT Silica Gel: 3.5 lbs 1.6 kg Maximum Adsorption Capacity: 21.47 fl oz 634 mL Maximum Air Flow: 25 cfm Maximum Reservoir Fluid Flow: 187 gpm Type of Medium: 100% Silica Gel Cartridge: A-358