John Deere HD Section Clean Grain Elevator Drive V-Belt, Effective Length 6850.0 mm (269.7 Inch). 9770 STS 9870 STS S670 S670H S680 S680H S685 S685H S690 S690H S760 S770 S780 S785 S790. Performance Design: John Deere HD Section V-belts are engineered to fit securely into the grooves of the pulley, maximizing power transmission and enhancing stability. Noise Reduction: V-belts significantly reduce noise levels and provide abrasion resistance, ensuring both quiet operation and long-lasting performance. Specification – Section Type: HD, Effective Length: 270 inch (6858 mm), Width: 0.63 inch (16 mm), Thickness: 0.63 inch (16 mm). Better quality for more consistent manufacturing processes.