ExMark OEM Replacement Blade 355-233
FITS MODELS: Explorer and Turf Ranger
requires 3 for 60'' deck; hi-lift blade 
Length 20 1/2'' (520.7mm)
Centre Hole 1/2'' (12.7mm)
Width 2 1/2'' (63.5mm)
Thickness .203'' (5.2mm)