This is an aftermarket replacement pulley for a 50" mower deck on compatible John Deere equipment. It is part of the deck drive system and helps route and carry the mower belt so the blades run properly. Built to match OEM This pulley is made as a direct replacement for the original deck pulley, with the belt path and mounting fit intended to match the factory-style setup. It is built for normal mower deck service where proper belt alignment and smooth rotation are important. Installation Installation is straightforward for a DIY mechanic with basic hand tools. Relieve belt tension, remove the old pulley, and install this replacement in the same location with no modifications required when used on the correct deck. .product-description-v2 { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: #1d1d1d; line-height: 1.55; max-width: 720px; } .product-description-v2 > div { margin-bottom: 18px; } .product-description-v2 h3 { font-size: 16px; font-weight: 700; color: #1d1d1d; margin: 0 0 8px; } .product-description-v2 p { margin: 0; font-size: 15px; } @media (max-width: 768px) { .product-description-v2 { font-size: 15px; } }