Selden Plain Sheave 21/4.2/9mm (Front Sheaves).Used on RS Q'BA#chr(59)# RS Vision#chr(59)# RS1#chr(59)# RS2#chr(59)# RS4#chr(59)# RS5 and 2 as the mast head sheave.OD - 21mmID - 4.2mmSheave width - 9mm
Selden Plain Sheave 21/4.2/9mm (Front Sheaves).Used on RS Q'BA#chr(59)# RS Vision#chr(59)# RS1#chr(59)# RS2#chr(59)# RS4#chr(59)# RS5 and 2 as the mast head sheave.OD - 21mmID - 4.2mmSheave width - 9mm