Ayp OEM Replacement Blades 302-458
Replaces/Fits 1726453/1726453A
Requires 3 for 50'' deck; toothed blade 
Length 18 3/16'' (462mm) 
Centre Hole 3/4'' (19mm)
Outer Hole 7/16'' (11.1mm) 
Centre 2 1/2'' (63.5mm)
Width 2 1/2'' (63.5mm)
Thickness .203'' (5.2mm)