Beckson® Acid Stroke Pumps With 2 Inch Buttress Adapter.The acid stroke pump is designed to safely transfer most acids eliminating the dangerous practice of lifting or tilting drums and carboys. The stroke pump housing and shaft are PVC resin for durability and long life, with Viton® valves and seals, and a polyethylene hose. Pumps are 1 1/2 inch diameter x 38 inches long, supplied with a 2 inch coarse thread buttress adapter and welded on 6 foot long, 1 1/4 inch diameter polyethylene discharge hose. The pump is self-priming and delivers 28 ounces a stroke. This acid stroke pump is UL-Listed for Sulfuric acid (50% concentration, 120º F maximum). They can safely transfer most acids. • Fits 55 gallon plastic drum • PVC with Viton® Seals • 28 oz per stroke • Hose Length: 6'