BLADE KNIFE FOR HONDA MOWER ROTARY MACHINES FOR MODELS H3013 , H4013 , H4514 , H4518 MODEL - TECHNICAL SPECIFICATIONS LENGTH 500 mm CENTRAL BORE 16 mm OUTER BORE - mm CENTRAL BORE INDEX - mm CODE: 13271351 ORIGINAL CODE: 72511-758-L00 , 72512-750-B20 SR