A&I XHT 14-5/8", 5PT Mower Blade (Single) - B1HV2201,1 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. (3) blades for 42" cut. Fits EZ-series 4216 and 4217 models. Center Hole 5 point star Length 14-5/8" Replaces 539-112078 Thickness .204 Type Medium Lift Width 2-1/2" Crossed From: 112078 SEARS / ROPER / AYP 12122 ROTARY 12122 ROTARY 539 11 20-78 HUSQVARNA 539 11 20-78 HUSQVARNA 539 112078 HUSQVARNA 5391120-78 HUSQVARNA 5391120-78 HUSQVARNA 539112078 HUSQVARNA 539112078 HUSQVARNA 95-084 OREGON 95084 OREGON This is an aftermarket product, not an OEM. A physical address must be provided, NO P.O. BOXES. Thanks for looking!