loaded: loaded sleeve locks coupler in place, helps to secure the connection between your straight coupler and this angle coupler and preventing leakage, make the grease filling more efficient and convenient. Designed: Grease coupler is designed with 90 degree, can grease hard to reach fittings in spaces, convenient for you to some difficult fittings, the 3 Jaw coupler design snaps grease fittings easier Material:These 90 degree crease coupler are made of quality carbon steel material, the surface is galvanized, which can prevent corrosion to the greatest extent , durable and sturdy, not easy to break,and has a service life. For with hand-operated grease Connects to standard grease couplers, with flex hose or rigid pipe Maximum operating pressure of 4, 500 PSI Colour: Silver Material: Carbon Steel Package Contents: 1 set x coupler adapters Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.