Set of three (3) replacement aftermarket USA made blades that fit John Deere models D170, D170, G110, G110, LA150, LA150, LA175, 190C, 190C, 3 for 54" mower deck, code GY20679 These blades are 18-5/8" long and 2-3/4" wide and a full 0.187" thick and feature John Deere's 7 point star center hole. Blade specifications as follows: Overall Length: 18-5/8" Width: 2-3/4" Thickness: 0.187" Mounting Hole: 7 Point Star