LIAERBA CUTTER BLADE MTD YARD MAN GUTBORD FOR MODELS SUPER45 , ROBUST46 , NICE46 MODEL - TECHNICAL SPECIFICATIONS LENGTH 456 mm CENTRAL BORE 10 mm OUTSIDE BORE 7.9 mm CENTRAL BORE INDEX 63.5 mm CODE: 13270320 ORIGINAL CODE 742-0121B , 742-0121 , 942-0121 SR