ExMark OEM Replacement Blade 330-302
FITS MODELS: Lazer AS, Lazer Z AC, Lazer Z AS, Lazer Z CT, Lazer Z XP and Lazer Z XS
Requires 3 for 60'' deck; hi-lift blade 
Length 20 1/2'' (520.7mm)
Centre Hole 15/16'' (23.8mm)
Width 2 1/2'' (63.5mm)
Thickness .203'' (5.2mm)