Alemite B6652-A is a grease gun extension hose and hydraulic coupler assembly Designed for use with hydraulic fittings. The assembly consists of hose assembly model 317850-1 and coupler model 6304-B. The hose assembly consists of a reinforced oil-resistant synthetic rubber tube (3/16 in. Id x 0.48 in. Od) and two permanently attached 1/8 in. Nptf male couplings. This hose assembly is 12 in. Long and has 12, 000 psi Minimum Burst Pressure and 4, 800 psi operating pressure. The couplings are made of zinc-plated steel for improved resistance to corrosion. This model Hose can only be used with Hand-operated equipment, including manual grease guns (should not be used with power-operated equipment). The Standard-type 1/8 in. Nptf (F) hydraulic coupler provides quick, positive and leak-proof connection with hydraulic fittings. It features a metal seal. The coupling sleeve has a knurled end for ease of handling and is made of zinc-plated steel for corrosion resistance. The overall Length of the hose and coupler assembly is 13.6 in. Alemite offers a large selection of high quality grease gun accessories to ensure durable and reliable performance. Alemite grease guns are built to perform in demanding applications. Unique, innovative designs ensure excellent performance and strong attention to quality production provides maximum durability. With the most outstanding range of products offered, Alemite grease guns and accessories will maximize your lubrication productivity.