Club Cadet OEM Replacement Blade 335-214
FITS MODELS: 300 and 900 series walk behinds, except models with cast alunium desks, with 21'' decks; mulching blade
Length 21'' (553.4mm)
Centre Hole Bowtie 
Outer Holes 5/16'' 917.5mm)
Centre 2 1/2'' (7.9mm)
Width 2 1/4'' (63.5mm)
Thickness .134'' (3.4mm)