ROTARY ROTARY KNIFE BLADE FOR ROTARY MOWER ROTARY MOWER CUTTERS GARTENLAND FOR MODELS GL15.5-105H , GL20-105H MODEL - TECHNICAL SPECIFICATIONS LENGTH 540 mm CENTRAL BORE Saddle , 6 prong EXTERNAL BORE - mm CENTRAL BORE INDEX - mm CODE: 13270303 ORIGINAL CODE: 742-0424A , 742-0424 , 742-0670A , 742-0670 SR