The product is a BMW Hypoid Axle Oil G4, specifically designed for the Rear Differential. It comes in a pack of 1 16.9 oz/500ml bottle, sealed and brand new. Made in Germany, this oil has a viscosity of 75W-80 and a GL Rating of GL-5. It does not come with a warranty. This high-quality oil is essential for maintaining the performance and longevity of your BMW's differential.