LEFT ROTARY BLADE FOR SNAPPER ROTARY MOWER FOR MODELS RD1740 , RD1840 , RD2040 , YT1740 , YT1840 , YT2040 MODEL - TECHNICAL SPECIFICATIONS LENGTH 519 mm CENTRAL BORE 25. 5 mm OUTER HOLE 9.3 mm CENTRAL HOLE INDEX 65 mm CODE: 13286774 ORIGINAL CODE 1719736ASM , 1719736A , 1719736 , 1727477 SR