Albion Engineering DL-45-T13 Professional Line Special Deluxe Manual Bulk Caulking Gun, 20 oz Special Deluxe Manual Bulk Gun 20oz Thrust: 375 lbf, Pressure: 120 psi An Albion Core Tool featuring a heavy duty 5/6" square drive rod driven by a pair of hardened steel gripping plates Double set of oiled leather pistons stiffened by a trio of steel washers for reliable suction during loading and dispensing