A&I XHT 19-1/2" Mulching Mower Blade (Single) - B1JD5015,1 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 38" cut. C to C N/A Center Hole 7 lobe Hole Diameter .7031" / 17.85mm Length 19-1/2" Outer Hole Diameter N/A Overall Length 19.50" / 495.30mm Replaces M154158 Thickness .197"/ 5.0mm Type Medium Lift Width 2.50" / 63.50mm Crossed From: AM100945 JOHN DEERE AM100946 JOHN DEERE AM100991 JOHN DEERE AM104652 JOHN DEERE AM137324 JOHN DEERE AM137325 JOHN DEERE AM137326 JOHN DEERE AM37979 JOHN DEERE JD18 MOW MORE M112974 JOHN DEERE M131157 JOHN DEERE M135167 JOHN DEERE M135168 JOHN DEERE M153118 JOHN DEERE M154159 JOHN DEERE M82409 JOHN DEERE M83459 JOHN DEERE M84472 JOHN DEERE 302-260 STENS 302260 STENS 330-361 STENS 330-736 STENS 330361 STENS 330736 STENS 50-2270 WINDSOR 502270 WINDSOR 6186 ROTARY 6421 ROTARY 7-06375 PRIME LINE 706375 PRIME LINE 91-403 OREGON 91338 LASER SALES 91403 OREGON This is an aftermarket product, not an OEM. A physical address must be provided, NO P.O. BOXES. Thanks for looking!