Mast corrector weights to place inside lower mast of IOMs for B and C rigs to allow boat to meet minimum weight.
9.6mm diameter to suit internal of 11mm mast sections.
10 grams each.
For B rig typically use 2 of these.
For C rig typically use 5 of these.
Hold in place above mast heel fitting with Silicone (non acetic) or super glue.