This is a A-B1PD1042 BLADE-MOWER, PRED, 21-5/16", 13/16" PN: B1PD1042Main Description As Following : A-B1PD1042 Blade, Mulching P.N: B1PD1042 Predator blades offer superior mulching capabilities over traditional mulching blades. The airflow tooth design increases blade strength while producing more airflow for smaller clippings. Predator blades have all the same benefits as XHT (Xtreme Hardness & Toughness) blades.(2) blades for 42" cut.Center Hole: 13/16"Length: 21-5/16"Thickness: .197Type: ToothedWidth: 2-3/4" Crossed From: M135880 JOHN DEERE , M135881 JOHN DEERE , M135882 JOHN DEERE , M139976 JOHN DEERE , 10074 ROTARY , 330-453 STENS , 330453 STENS , 50-4440 WINDSOR , 504440 WINDSOR , 7-044013 PRIME LINE , 7044013 PRIME LINE , 91-446 OREGON , 91-929 OREGON , 91446 OREGON , 91929 OREGON , 96-365 OREGON , 96365 OREGON Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada