This product is 14 inches extension for far-to-reach grease fittings on cars, trucks, farm equipment. It is equipped with a hydraulic coupler and a slide-on locking sleeve. This has a simple push-on motion quickly attaches to a standard grease coupler for quick service, is zinc plated for maximum protection against corrosion, and is for use on hand-operated grease guns only. The recommended working pressure is 3, 000 PSI (207 bar), and the maximum operating pressure is 4500 PSI (310 bar). Lomax is a manufacturer of lubrication and fluid management products. Our products, including grease guns, manual and electric pumps, funnels, drains, grease fittings, filter wrenches, and accessories, are built to the highest standards and incorporate many proprietary features. Lomax's mission is to provide professionals and consumers with innovative and high-quality products to get the job done right. Product development at Lomax goes beyond the physical product, to a deeper understanding of the end-users' needs. Engineered with the "user-in-mind, " Lomax products are built to the highest standards and incorporate many unique features that make work easier, faster and cost-effective. We have a passion for the design process. We listen to our customers and their ever-expanding requirements. Our unique products lead the field in design, quality, and performance.