John Deere OEM, Part Number: M138583 Fits: John Deere: 4120, 4320, 4520 ,4720, 2025R, X300, X304, X324 Width 5/7" X Length 116" Made From Strong Material to Prevent Stretching and Rollover John Deere Original Equipment V-Belt #M138583. **SECONDARY BELT** Fits the following John Deere models: 2025R(-1LV2025RCHH100000), X300(42"M)(050001-), x304(42"M)(050001-), X310(42"M), X320(42"M), X324(-050001-), X340(42"M), X360(42"M). This is a OEM John Deere part. Thanks for looking!