A&I XHT 21", 5PT Mower Blade (Set of 4) - B1EP1010,4 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 42" cut. Fits Husqvarna lawn tractor and Consumer Z models YTH1542XP, YTH1542XPG, LTH1342, and LTH1342A. Center Hole 5 point star Length 21" Thickness .156 Type High Lift - Notched Width 2-1/4" Crossed From: 127843 SEARS / ROPER / AYP 38971 SEARS / ROPER / AYP 138971X431 SEARS / ROPER / AYP 139775 SEARS / ROPER / AYP 340-178 STENS 340-182 STENS 340178 STENS 340182 STENS 521981601 HUSQVARNA 53-213-84-98 HUSQVARNA 531307224 HUSQVARNA 532 12 78-43 HUSQVARNA 532 13 84-98 HUSQVARNA 532-13-84-98 HUSQVARNA 532-13-89-71 HUSQVARNA 532-1384-98 HUSQVARNA 532127843 HUSQVARNA 53213 89 71 HUSQVARNA 532131323 HUSQVARNA 532138498 SEARS / ROPER / AYP 532138971 HUSQVARNA 532138971 MCCULLOCH 532138971 POULAN 532138971 SEARS / ROPER / AYP 125 ROTARY 6265 ROTARY 66291219 RURAL KING 7-04982 PRIME LINE 7-06707 PRIME LINE 704982 PRIME LINE 706707 PRIME LINE 91-436 OREGON 91331 LASER SALES 91334 LASER SALES 91436 OREGON 95-032 OREGON 95032 OREGON 17532138498 SEARS / ROPER / AYP 917532139775 SEARS / ROPER / AYP 917532422719 SEARS / ROPER / AYP 917539110460 SEARS / ROPER / AYP 917777134149 SEARS / ROPER / AYP This is an aftermarket product, not an OEM. A physical address must be provided, NO P.O. BOXES. Thanks for looking!