COMPLETE SPINDLE ASSEMBLY (ALSO CALLED MANDREL) REPLACES PART NUMBER 143651, 532143651, 82-510, 9519 AND 285-041. INCLUDES HOUSING 137152, SHAFT WITH BEARINGS 137553. HARDWARE FOR MOUNTING BOLTS. HARDWARE FOR MOUNTING BOLTS, HAS 5 POINT STAR PATTERN. VERY IMPORTANT WHEN INSTALLING THE PULLEY TO PUT THE SPACER UNDER THE PULLEY BETWEEN THE PULLEY AND TOP BEARING. IF INSTALLED WITHOUT SPACER OR WITH THE SPACER ON TOP OF THE PULLEY DAMAGE WILL OCCUR TO THE SHAFT AND PULLEY. IF YOU ARE NOT 100% SURE THIS IS WHAT YOU NEED, PLEASE FIND OUT FULL MOWER MODEL NUMBER AND E-MAIL US TO CONFIRM BEFORE YOUR PURCHASE.