Whitmore Air Sentry Model: XR-522 Dimension: 5.25'' DIA x 10'' TALL 2'' MNPT   Specifications: Check Valve PSI In/Out: 0.1 0.1 Height: 11.5 in 29.2 cm Diameter: 5.2 in 13.2 cm Mounting Connection: 2" MNPT Silica Gel: 2.7 lbs 1.2 kg Maximum Adsorption Capacity: 16.56 fl oz 489 mL Maximum Air Flow: 25 cfm Maximum Reservoir Fluid Flow: 187 gpm Type of Medium: 100% Silica Gel Cartridge: A-352