BLADE KNIFE FOR HONDA MOWER ROTARY MACHINES FOR MODELS HR21 , HR214 , HR216 , HRA214 , HRA216 MODEL - TECHNICAL SPECIFICATIONS LENGTH 525 mm CENTRAL BORE 21 mm OUTER BORE 10.5 mm CENTRAL BORE INDEX 88 mm CODE: 13271026 ORIGINAL CODE: 72511-VA4-641 , 72511-VA4-640 , 72511-VA3-640 SR