John Deere OEM Replacement Blade 330-373
FITS MODLES: GS25, GS45 AND GS75 commercial walk behinds; GT242-GT275, LX172-LX188, 240-455 series; and ZTrak F620 front mounts 
Requires 3 for 48'' deck; hi-lift blade
Lenght 16 5/8'' (422.3mm)
Centre Hole 13/16'' (20.6mm)
Width 2 1/2'' (63.5mm)
Thickness .203'' (5.2mm)