Aftermarket Replacement for Husqvarna Part Numbers: 531 20 78-48,  531-207848,  5312078-48,  531207848,  5818431-01/8, 581 84 31-01, 581-843101, 581843101, 5818431-01, 

For Husqvarna Lawn Mowers: 

LB48V, 96697580200, 2011-01,
LC48, 96697630100, 2009-03,
LC48V, 96697530100, 2009-03,
LC48V, 966975303, 2013-02,
LC48VE, 96697540300, 2011-01,
Master 50S, 106283461,
ROYAL R153S, 2002-02, LAWN MOWER,
Royal R153S, 153S, 9538770-05, 2002, 
R153S3, 953876567, 2005-02,
R153S, 953876569, 2004,

1 x Brand New Best Quality Aftermarket Replacement Blade Boss Holder Hub, 

This is the part which fits over the engine crankshaft to enable the blade to be attached. 

This type also has the integrated pulley in the top for the self propelled system drive belt to run off. 

FREE DELIVERY WITHIN THE UK !