ROTARY BLADE TAG LIAERBAKER MTD YARD MAN GUTBORD FOR MODELS 11/81 , B10 , SUPER18HN , SUPER18/117N MODEL - TECHNICAL SPECIFICATIONS LENGTH 413 mm CENTRAL BORE 10.3 mm OUTER BORE 7.9 mm MIDDLE HOLE 63.5 mm CODE: 13270291 ORIGINAL CODE 742-0498 SR