Includes 1 blade for many 42 in. cut John Deere, Sabre, and Scott's mowers Replaces OEM #'s GX20249, GX20433, GY20567 and 50-3036 Measures: 21 in. L and 2-1/2 in. W 0.675 in. center hole diameter Manufactured to meet or exceed all OEM specifications All MaxPower blades are sharpened during the manufacturing process and then powder coated for your protection. This coating will come off during the first cut to reveal a precision sharpened blade.