1. Robust Design This grease coupling is specifically designed for heavyduty use and can withstand operating pressures up to 4500 PSI (310 bar). It is compatible with most manual and pneumatic grease tools, ensuring reliable performance. 2. LeakProof Performance Equipped with a builtin springloaded ball check valve, this coupling provides leakproof performance during lubrication. It prevents leaks, pressure loss, and grease backup, delivering a seamless and efficient lubrication experience. 3. Compact and Versatile With its compact fit and small outer diameter, this coupling allows easy access to recessed fittings. It ensures a tight and secure connection, enabling lubrication in hardtoreach areas. 4. Durable and Resilient Made from carbon steel, this coupling is zincplated for enhanced durability and resilience. It offers longlasting protection against rust and other forms of corrosion, extending its service life. 5. Easy Installation and Removal The knurled body and flat surfaces of this coupling simplify installation and removal. Its ergonomic design ensures a firm grip and hassle operation.