21 INCH MULCHING BLADES: Engineered to perfectly fit 21-inch lawn mowers manufactured from 2012 on, ensuring precise cutting performance by effectively mulching grass clippings into fine particles COMPATIBILITY: Compatible with Yard Man, Yard Machines, Troy-Bilt, Huskee, Bolens and Craftsman units built in 1995 and after; they will also fit select Murray and Snapper units built in 2012 an after FITS WALK-BEHIND MOWER MODELS: Including, but not limited to: 11A-B0BL765, 11A-B0S5700, 11A-B0BL700, 11A-A2S5700, 12A-A0BE700, 11A-A00X700, 12A-A0M5700 REPLACEMENTS: These lawn mower blades can be used as a direct replacement for Cub Cadet models including, but not limited to: CC469, CC989, CC997ES, PR521, S621, S621SS, SC621, SC621E, SR621, SRC621 REFERENCE OWNERS MANUAL: To ensure a proper fit for your mower, reference your owner’s manual, model numbers are located on the mower deck housing by the handlebars