John Deere OEM Replacement Blade 330-506
 FITS MODELS: 777, 797, 997, 1400 and 1500 series front mounts 
Requires 3 for 72'' deck; hi-lift blade 
Length 25'' (635mm)
Centre Hole 29/32'' (23mm)
Width 3'' (76.2mm)
Thickness .250'' (6.4mm)