As an OEM belt manufacturer, the serpentine belts are precision ground two times to insure adherence to OEM specification. Belts produced from a mold process will not achieve the exact rib profiles that are required by OEM suppliers. Bando USA belts are made with EPDM rubber which adheres to OEM specification which is more heat resistant and long lasting. Precise metric sizing and machine cut ribs for a more exact OE fit. Proprietary EPDM compounding for longer life. Soft compound backing to reduce noise. Bidirectional cord to eliminate tracking. Bando USA OEM Quality Serpentine Belt