Walker OEM Replacement Blade 355-713
Requires 1 of 335-713 and 1 of 335-709 for 48'' deck; left hand blade; medium-lift blade 
Length 25'' (635mm)
Centre Hole 5/8'' (15.9mm)
Outer Hole 3/16'' (4.8mm)
Centre 3'' (76.2mm)
Width 2 3/4'' (69.9mm)
Thickness .203'' (5.2mm)