ExMark OEM Replacement Blade 355-279
FIT MODELS: Lazer AS, AC, LC, XP, XS and Next Lazer Z ASX
Requires 3 for 72'' deck; mulching blade 
Length 24 1/2' (622.3mm) 
Centre Hole 15/16'' (23.8mm) 
Width 3'' (76.2mm) 
Thickness .203'' (5.2mm)