'O' rings - 1.8, 2.5, 3.5, 5, 7 &13 mm internal Ø

'O' rings - 1.8, 2.0, 2.5, 3.5, 5, 7 or 13 mm internal Ø. Highly weather resistant. 10/pack.

1.8 mm Ø, for use as spares for 030-025 rigging screws.

2.0 mm Ø, for use on 3 mm Ø booms.

2.5 mm Ø, for use on 4 mm Ø booms, and as spares for 030-030 rigging screws.

3.5 mm Ø, for use on 5 mm Ø booms, and as spares for 030-035 and 030-040 rigging screws.

5 mm Ø, for use on 8 mm Ø booms.

7 mm Ø, for use on 10, 11, 12 Ø booms.

13 mm Ø, for use on 14, 16, 18 mm Ø booms.

An 'O' ring added to the mast head makes a simple and quick attachment method for a SAILSetc wind indicator. A band in the lower end of the wind indicator wire engages in a hole drilled in the mast. Note the bend in the wind indicator wire when used with 025-100.