A&I XHT NON-NOTCHED 112111-02 Mower Blade (Set of 6) - B1BC1208,6 XHT (Xtreme Hardness & Toughness) blades feature a unique steel that incorporates boron, carbon, manganese, and other materials that ensure its strength. The blades are heat treated with the patented and independently tested Marbain heat-treating process. This process makes the blades 25% - 40% harder than standard lawnmower blades, making them the longest-lasting, safest, and most impact resistant lawnmower blades on the market. Standard non-notched version matches OEM direct replacement. (2) blades for 36" cut. (3) blades for 54" cut. Fits XM series. Center Hole 5/8" Length 18" Replaces 112111-02 Thickness .197 Type High Lift Width 2-1/2" Crossed From: BC18A MOW MORE BO-17A J. THOMAS BO17A J. THOMAS 11211-02BOBCAT 1121102 BOBCAT 112111-02 BOBCAT 11211102 BOBCAT 2722543-02 BOBCAT 272254302 BOBCAT 301-015 STENS 301015 STENS 310-110 STENS 310110 STENS 3401 ROTARY 50-2205 WINDSOR 50-2295 WINDSOR 502205 WINDSOR 502295 WINDSOR 7-04616 PRIME LINE 704616 PRIME LINE 71440004 WRIGHT 71440005 WRIGHT 71440009 WRIGHT 71440009-0 WRIGHT 714400090 WRIGHT 91277 LASER SALES 93-010 OREGON 93010 OREGON This is an aftermarket product, not an OEM. A physical address must be provided, NO P.O. BOXES. Thanks for looking!