A&I XHT 20-1/2", 5/8", HL Mower Blade (Set of 6) - B1DC1506,6 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. (3) blades for 60" cut. Center Hole 5/8" Length 20-1/2" Thickness .250 Type High Lift Width 2-1/2" Crossed From: UDCH7 GREEN MEADOW 03253900 ARIENS / GRAVELY 038946 ARIENS / GRAVELY 09081200 ARIENS / GRAVELY 10175 ROTARY 103-1580-S EXMARK 1031580S EXMARK 15009 ROTARY 151518 EDGE WATER 20-0156 LANDSCAPER EXPRESS 200156 LANDSCAPER EXPRESS 20656100 ARIENS / GRAVELY 20656151 ARIENS / GRAVELY 2233 LANDSCAPER EXPRESS 2233 LANDSCAPER PRO 231724 LANDSCAPER EXPRESS 30227-60 DIXIE CHOPPER 30227-60H DIXIE CHOPPER 30227-60N DIXIE CHOPPER 30227-60V DIXIE CHOPPER 3022760 DIXIE CHOPPER 3022760H DIXIE CHOPPER 3022760H DIXIE ELECTRIC 3022760N DIXIE CHOPPER 3022760V DIXIE CHOPPER 315-250 STENS 315-503 STENS 315-511 STENS 315250 STENS 315503 STENS 315511 STENS 320-568 STENS 320568 STENS 38946 ARIENS / GRAVELY 50-2805 DEALERS CHOICE 502805 DEALERS CHOICE 602771 HUSTLER 6194 ROTARY 6441 ROTARY 7-04572 PRIME LINE 7-06356 PRIME LINE 704572 PRIME LINE 706356 PRIME LINE 793794 HUSTLER 8979651 ARIENS / GRAVELY 90-109 OREGON 90109 OREGON 91-506 OREGON 91-509 OREGON 91506 OREGON 91509 LANDSCAPER EXPRESS 91509 OREGON 92-038 OREGON 92038 OREGON 9383 DIXON This is an aftermarket product, not an OEM. A physical address must be provided, NO P.O. BOXES. Thanks for looking!