The Kivivaka Metal Lawn Mower Idler for John Deere X300, X304, X310, X320, and X330 is a durable and reliable solution designed to enhance the performance of your mower. Made of high-quality metals, this idler provides optimal performance and durability, ensuring long-lasting service. The idler is compatible with UC26511 M151720, allowing you to install it on your specific John Deere mower model. With its easy-to-install design, you can achieve smooth and efficient operation in no time. The idler's durable belt guide pulley ensures smooth transitions between mower blades, reducing noise and increasing efficiency. Invest in the Kivivaka Metal Lawn Mower Idler today and experience the difference in performance and longevity.