This is a A-B1EP1017 BLADE-MOWER, 18-1/4", 5PT, HD PN: B1EP1017Main Description As Following : A-B1EP1017 BLADE-MOWER, 18", 5PT, HD P.N: B1EP1017 Replacement XHT Lawnmower blade. XHT(Xtreme Hardness & Toughness) blades are 25-40% harder than standard lawnmower blades. Benefits of the HXT blade are sharper and longer lasting cutting edges. More resistance to bending. Tighter tolerances in the aftermarket vs. OEM. XHT blades also offer greater impact toughness.(2) blades for 36" cut.(3) blades for 52" cut. Fits Husqvarna Estate Series model ES5221.Center Hole: 5 point starLength: 18"Thickness: .187Type: Low LiftWidth: 2-1/4" Crossed From: 13-21 HUSQVARNA , 131321 CRAFTSMAN , 131321 SEARS / ROPER / AYP , 1321 HUSQVARNA , 137415 CRAFTSMAN , 137415 SEARS / ROPER / AYP , 1657589 ALLIS-CHALMERS , 1657589 SIMPLICITY , 1657589A ALLIS-CHALMERS , 1657589A SIMPLICITY , 1657589AS ALLIS-CHALMERS , 1657589AS SIMPLICITY , 1657589ASM ALLIS-CHALMERS , 1657589ASM SIMPLICITY , 20-79 HUSQVARNA , 2079 HUSQVARNA , 340-153 STENS , 340-166 STENS , 340153 STENS , 340166 STENS Found in Section & Models : Sunbelt - Blades > Blades, AYP (UNDEFINED): SEVERAL (36"), Husqvarna (UNDEFINED): SEVERAL (36" & 52"), Husqvarna MOWER, ZERO-TURN: MZT52 967177011 Associated Items : New Also This is An Aftermarket Product And : XHT (Xtreme Hardness & Toughness) blades feature a unique blend of steel that ensures it's strength
and are heat treated with a process that results in making them 25% - 40% harder than standard
lawnmower blades. This makes XHT blades the longest lasting, safest, and most impact resistant
lawnmower blades on the market. (2) blades required for 36" cut. (3) blades required for 52" cut. Fits Husqvarna Estate Series model ES5221. Center Hole: 5 point star Length: 18-1/4" Thickness: .187" Type: Low Lift Width: 2-1/4"