Prestone 520K6 Premium Serpentine Belt Top fabric and rubber layers provide long lasting protection to the critical tensile cord reinforcement system Precision machined ribs ensure maximum pully contact and consistent power transfer Our oil heat and abrasion resistant rubber blend resists wear and cracking Our research and development team persistently updates our product line so that we may continue to deliver drive belts with flawless fit and function for nearly every vehicle on the road today Prestone: Protection inside and out