ExMark OEM Replacement Blade 355-295
FITS MODELS: Lazer Z, Serial No. 540,000 and higher 
Requires 3 for 60'' deck; mulching blade 
Length 20 1/2'' (520.7mm)
Centre Hole 15/16'' (15.9mm)
Width 3'' (76.2mm)
Thickness .203'' (5.2mm)