Flexzilla Grease Hose With Spring Guard 3/16" X 36" With 1/8" Mnpt EndsFlexzilla Grease Hose with Spring Guard, 3 16"e; x 36"e; with 1 8"e; MNPT Ends Flexzilla Grease Hoses are more flexible than traditional rubber or thermoplastic hoses and stay flexible, even in subzero temperatures. Hose Features: Extreme all weather flexibility 10,000 psi working pressure Heavy duty, high quality 1 8 Inch MNPT fittings Inside diameter 3 16 Inch For use with manual, battery or air operated grease guns Coupler is sold separately