John Deere OEM Replacement Blade 302-622
FITS MODELS: F910, F911, F912, F925, F930, F932, F935 and F1145 front mowers; 670, 755, 770, 790, 855, 955, 4010, 4100, 110, 4115, 4120, 4520 and 4720 compact tracotrs;420, 425, 430, 455 and 455 lawn tractors 
Requires 3 for 60'' deck; toothed blade; spring washer included
Length 20 1/2'' (520.7mm)
Centre Hole 7/8'' (22.2mm)
Width 3'' (63.5mm)
Thickness .250'' (6.4mm)