The genuine GRANIT 6528885300118 O-Ring Assortment is specifically designed for air conditioning service and repairs. This comprehensive kit includes 270 high-quality O-rings in 18 different, commonly used sizes, ensuring a wide range of applications. Manufactured from HNBR (Hydrogenated Nitrile Butadiene Rubber), these O-rings offer excellent resistance to refrigerants, oils, and high temperatures, making them ideal for demanding AC systems in agricultural and construction machinery. The assortment comes in a convenient, organized plastic case for easy storage and selection.