MTD Replacement Part Double Pulley Spindle Assembly Quality Aftermarket Double Spindle Assembly Top Pulley 5-5/8" OD, Bottom Pulley 5" OD Replaces MTD Troy Bilt White 618-04134 918-04134 618-04134A 918-04134A 618-04134B 918-04134B 618-04134C 918-04134C 618-04134D 918-04134D