The John Deere AZ63721 is a genuine OEM hydraulic cylinder kit designed for a wide range of John Deere agricultural machinery. This essential component ensures reliable and efficient operation of hydraulic systems in models including 9970, 9986, 9996 Cotton Pickers; 7180, 7250, 7280, 7350, 7380, 7450, 7480, 7550, 7580, 7750, 7780, 7850, 7880, 8100, 8200, 8300, 8400, 8500, 8600, 8700, 8800 Forage Harvesters; 8100, 8100T, 8110, 8110T, 8200, 8200T, 8210, 8210T, 8300, 8300T, 8310, 8310T, 8400, 8400T, 8410, 8410T, 8520, 8520T, 9100, 9200, 9300, 9300T, 9400, 9400T, 9520, 9520T, 9530, 9530T, 9620, 9620T, 9630, 9630T Tractors; and 4890, 4895, 4990, 4995 Windrowers. Manufactured to John Deere's rigorous standards, this kit provides precise fit and lasting durability for critical hydraulic functions.