Toro OEM Replacement Blade 345-203
FITS MODELS: 21'' recycer without blade saddle
Hi-lift blade 
Length 20 7/8'' (530.2mm)
Centre Hole 7/16'' (11.1mm)
Outer Hole 3/8'' (9.5mm)
Centre 2 7/16'' (61.9mm)
Width 2 7/8'' (73mm)
Thickness .134'' (3.4mm)