Countax OEM Replacement Blade 305-0929
FITS MODELS: 169381400, IBS machines with 50'' (1.27m) mowing deck
length 18 1/4'' (464mm)
3/8'' (9.92mm) 
Centre Bore 13/32'' (10.3mm)
1 13/16'' (46mm)
Pitch centre 2 1/4'' (57mm)
5/32'' (4mm)