Oregon 91-621 John Deere and Bolens Replacement Lawn Mower Blade 16-1/2 in 16-1/2" Length, 5/8" Center, 3" Width, 0.203" Thickness, 1-1/2" Lift Replaces John Deere # M73509 Replaces Bolens PL4205 Bolens and John Deere (3) for 48" Cut, High Lift Blade