Knife blade for lawnmowers, lawn-trimmer mowers HONDA FOR HR173 MODELS MODEL - TECHNICAL SPECIFICATIONS LENGTH 418 mm CENTRAL BORE 28 mm OUTER BORE 6X8.5 mm CENTRAL BORE INDEX 50 mm CODE: 13270064 ORIGINAL CODE: 72511-VA9-506, 72511-VA9-640 , 72511-VA9-630 , 72511-VA9-010 , 72511-VA9-000 SR