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The ISS stringer adjusts the flex of your board.
Available in 3 flex levels:
- Soft Flex: for cold waters and for riders who are looking for flex. 20% bidirectional fiberglass, 80% unidirectional fiberglass.
- Mid Flex: for cool waters. 20% carbon fibre, 80% bidirectional fiberglass.
- Stiff Flex: the most rigid one. For warm waters and riders who are looking for rigidity. 60% carbon fibre, 40% bidirectional fiberglass.
Available in Medium size for 39,5" to 41" boards and in Large size for 41,5" to 43" boards.
