Fits The Following John Deere ZTrak Zero-Turn Models with 54A Accel Deep Decks ONLY. Z535M ZTrak Mower Z540M ZTrak Mower. Includes the Following Parts. (3) 19″ x 2-3/4″ Blades – Replaces John Deere M143520, UC22010 (3) Spindle Assemblies (Pulleys and Hardware Not Included) – Replaces John Deere AM144608.