ILCA 4 MK2 Batten Set - Set of 3 Batten set for the new ILCA 4 MK II sail. This new sail design requires this unique batten set. Class Legal for Racing: The new ILCA 4 MK II sail will become class legal on August 1, 2026, in time for the ILCA 4 World Championship. The new ILCA 4 MK II sail requires a unique three-batten set. Existing ILCA 4 MK I battens are not compatible. Includes 2 long 600 mm battens and 1 shorter 350 mm batten.