MTD YARD MAN GUTBORD YARD MOWER BLADE FOR 76 CM MODELS MOWER BLADE WITH 8 BLADES MODEL - TECHNICAL SPECIFICATIONS LENGTH 245 mm CENTRAL BORE 21 mm OUTER BORE 6.5/8 mm INDEX OF CENTRAL BORE 58 mm CODE: 13270289 ORIGINAL CODE 742-0495B , 742-0495 , 942-0495 SR