A&I XHT 17", 5/8", HL Mower Blade (Set of 6) - B1GR1905,6 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 50" cut. ZTR. Fit models 991006, 992009, 888015, Pro 100, 200 and 300 series. Center Hole 5/8" Length 17" Thickness .250 Type Medium Lift Width 2-1/2" Crossed From: C046998A RIENS / GRAVELY GR17B MOW MORE PL7329 BUNTON 046998 ARIENS / GRAVELY 060636 LESCO 087792 ARIENS / GRAVELY 08779200 ARIENS / GRAVELY 08779251 ARIENS / GRAVELY 08899600 ARIENS / GRAVELY 09082400 ARIENS / GRAVELY 21285051 ARIENS / GRAVELY 30227H DIXIE CHOPPER 320-535 STENS 320535 STENS 330-308 STENS 330308 STENS 345-197 STENS 345197 STENS 350-199 STENS 350199 STENS 46998 ARIENS / GRAVELY 50-2080 WINDSOR 50-2160 WINDSOR 502080 WINDSOR 502160 WINDSOR 50581 LESCO 6181 ROTARY 7-04418 PRIME LINE 7-06332 PRIME LINE 7-06340 PRIME LINE 7-06495 PRIME LINE 704418 PRIME LINE 706332 PRIME LINE 706340 PRIME LINE 706495 PRIME LINE 87792 ARIENS / GRAVELY 8779251 ARIENS / GRAVELY 8861651 ARIENS / GRAVELY 8899600 ARIENS / GRAVELY 9082400 ARIENS / GRAVELY 91-251 OREGON 91251 OREGON 91727 LASER SALES 91735 LASER SALES This is an aftermarket product, not an OEM. A physical address must be provided, NO P.O. BOXES. Thanks for looking!