Mower Blade 21.12" long x .2.50" wide x 42"ID hole. CW. 15-1006 . 27-2720 202720 supersedes to 20-2720-03. This blade is stamped 20-2720 and W03730. New OEM Toro part number 20-2720.
Mower Blade 23.75" long x 3.00" wide x 1.37"ID hole. Reversable, Flat blade with two sets of cutting edges so it can be flipped over to use both sides. CCW. Stamped 15715.