KNIFE BLADE FOR HONDA MOWER ROTARY MACHINE FOR MODELS HRB423 , HRB423K1 MODEL - TECHNICAL SPECIFICATIONS LENGTH 420 mm CENTRAL BORE 27 mm OUTER BORE 10 mm CENTRAL BORE INDEX 95 mm CODE: 13270065 ORIGINAL CODE: 72511-VA9-H50 , 72511-VA9-B50 SR