Husqvarna OEM Replacement Blade 340-022 
Requires 2 for 38'' deck; hi-lift blade 
Length 19 1/4'' (489mm)
Centre Hole 3/8'' (9.5mm)
Outer Hole 3/8'' (9.5mm)
Centre 10'' (254mm)
Width 2 1/4'' (57.2mm)
Thickness .187'' (4.7mm)