This Caterpillar (CAT) 6V-8398 or 6V8398 O-RING is a brand new replacement part that is compatible with Caterpillar heavy equipment. It is designed to provide a reliable seal and prevent leaks in your machinery. The O-RING is made of high-quality materials and meets industry standards. Please note that this product contains chemicals known to the State of California to cause cancer and reproductive harm, as stated in the California Prop 65 Warning. This NEW O-RING is ideal for those in the heavy equipment industry who need a dependable replacement part.