The Zeeline ZE550 hand operated grease pump is designed to fit 25-50 pound pails of grease. It has a max output pressure of 3,500 PSI and delivers at a rate of 1.2 ounces per stroke. Includes a 4 jaw coupler (ZE27SP), follower plate (ZE107016) and a 6"™ high pressure hose. Also includes a carrying handle for easy mobility and can handle up to NLGI #2 grease.