This 2 pack of Atomlube Ultra Heavy Duty Red Grease is a general purpose high-performance lubricant designed for extended chemomechanical durability. Formulated with a proven nano-engineered additive, our Heavy Duty Red Grease cartridge develops strong adhesion to metal surfaces, providing lasting protection during periods of extreme pressures and loads and high temperatures. Atomlube's superior resistance to oxidation and washout guarantees extended service life and longer lubrication intervals. Ultra Heavy Duty Red Grease meets the National Lubricating Grease Institute (NLGI) performance classification GC-LB for automotive applications. Our Heavy Duty Red Grease is also excellent for use with a wide range of mechanical components and systems such as bearings, pins, couplings, pumps, and conveyors. Heavy Duty Red Grease is not recommended for small anti-friction bearings operating over 5000 rpm. We proudly design and manufacture our products in the USA. You can use AtomLube Heavy Duty Red Marine Grease gun grease tubes with confidence, knowing that our products have been perfected for your mechanical protection. Works well for boat grease, tractor grease, mechanical equipment, lithium grease and more!