Tack fitting - various Ø
Details
Ball raced tack fitting - 8, 9.5, 10, 11 or 12 mm Ø. Choose from sizes to fit 8, 9.5, 10, 11 or 12 mm Ø round tube mast only, to suit USA 1M and similar boats. Not permitted in the IOM class.
Where class rules permit this fitting helps the tack of the mainsail rotate freely around the mast.