blades for mower cutter blades MTD YARD MAN GUTBORD for mower models 40 13/102 , 16/102 , 20/102 , E145 , E/160 , E/165 MODEL - TECHNICAL SPECIFICATIONS LENGTH 520 mm CENTRAL BORE 10 mm OUTER BORE 8 mm CENTRAL BORE INDEX 63. 5 mm CODE: 13270297 ORIGINAL CODE 742-0608C , 742-0608B , 742-0608A , 472-0608 SR