Size：ID 3.35 Inch，OD 5.50 Inch，Thickness 0.128 Inch Replace Rotary Cutter Models: 1287, 1812, 2212, 277, 285, 287, 320, 3610, 3615, SQ142, SQ148, SQ160, SQ172, SQ184, SQ600, SQ720, SQ84T Replace Rotary Tiller Models: RTH60, RTH72, RTH80, RTH88, RTN60, RTN72, RTN80, RTS50, RTS50-05, RTS50-4, RTS62, RTS62-04, RTS62-05, RTS74, RTS74-02, RTS74-03 Replacement part number：1805010；125811;168556；2255533；247000054；36F24；31953；48A39；501-0552； 5010552；64651；64651BH；919-FP5533；FP5533；970-4140；PM970-4140；988820；9719704140；971-9704140；91561；VTE7902；ABP247000054A；BFD13；BFD-13；BP247000004Z； BP247000054SQ；W9704140DS；C1894；HA00265；CA 728412529