HONDA ROTARY MOWER KNIFE BLADE FOR ROTARY MOWER FOR MODELS HRB475 , HRB476 , MODEL - TECHNICAL SPECIFICATIONS LENGTH 475 mm CENTRAL BORE 21 mm OUTER BORE 10.5 mm CENTRAL BORE INDEX 88 mm CODE: 13270068 ORIGINAL CODE: 72511-VE0-N00 , 72511-VE0-471 , 72511-VE0-740 SR