Whitmore Air Sentry Model: X100 Dimension: 3.25''DIA x 6.25''TALL 1/2'' FNPT   Specifications: Check Valve PSI In/Out: 0.3 / 0.3 Height Inches (cm): 6.25 (15.9) Diameter Inches (cm): 3.25 (8.3) Mounting Connection: 1/2" FNPT Silica Gel LBS (kg): 0.8 (0.4) Maximum Adsorption Capacity FL. Ounces (ml): 4.91 (145) Maximum Air Flow CFM: 10 Maximum Reservoir Fluid Flow GPM: 75 Type Of Medium: 100% Silica Gel Uses Replacement Cartridge: L-143