XYLEM ACCUMULATOR TANK 21 OZ. 21.5 Ounce Working Water Volume; 5 Inch Diameter x 9 Inch Height; 1/2 Inch Hose Barb And 1/2 Inch - 14 Threaded Port Fitting; Straight; Maximum Pressure Up To 125 PSI/ Pre-Charged Pressure Up To 10 PSI; Pneumatic Bladder