This fin is compatible with all ITIWIT inflatable paddle boards sold from 2019 onwards. SUP 10'|11'|13'|14' models and the new S / M / L. This quick-installation fin is compatible with the following models: ITIWIT touring inflatable SUP from 2019+, SUP 10'|11'|13'|14', tandem, SUP 100 S, M and L.