John Deere M43820 Secondary Deck Drive Belt is designed to power the lawn mower blades efficiently. It works in conjunction with the primary deck drive belt, which is sold separately and pulls power directly from the engine. Crafted from strong materials, this belt resists stretching and rolling over, ensuring smooth engagement and consistent power delivery. As a John Deere equipment manufacturer (OEM) part, it s quality and reliability. If you need assistance finding the right John Deere part or accessory, John Deere specialists are available Monday through Friday from 8:00 AM to 5:00 PM EST by calling 800-345-2396 or via email. Hartville Hardware strives to provide accurate parts recommendations based on reliable information, but since parts and compatibility may change without notice, customers are encouraged to contact Customer Support if unsure about the part needed. Model Number: M43820