The KUHN 58578400 arm is a genuine OEM replacement part designed for various KUHN GMD series disc mowers. This critical component ensures the proper functioning and smooth operation of the mower's cutting unit. Manufactured from durable materials, it provides long-lasting performance and maintains the efficiency of your agricultural machinery. Confirmed fitment includes GMD 280, GMD 310, GMD 350, GMD 400, GMD 44, GMD 500, GMD 600, GMD 66, GMD 700, GMD 77, GMD 800, GMD 88, GMD 900, and GMD 99 models.