TORO GROUNDMASTER 52 , GROUNDMASTER 117 , GROUNDMASTER 220 , PROLINE 118 , PROLINE 36 , PROLINE 52 , Z200 , Z252 , Z 253 , Z255 , Z257 MODEL - TECHNICAL SPECIFICATIONS LENGTH 455 mm CENTRAL BORE 12. 7 mm OUTER HOLE - mm CENTRAL HOLE INDEX - mm CODE: 13270405 ORIGINAL CODE 27-0990-03 , 27-0990 SR