SMALL SUP FIN - FLEXI PLASTIC FOR EXTRA DURABILITY - WITH UNIVERSAL NUT AND BOLT  This small fin is designed to allow all boards a short fin option, it is highly durable and great for kids in shallow water and river paddling. If you have kids and want a durable small fin or just live where there's rocks or low tides and feel you want something that can withstand a bit more rough and tumble -This fin is for you!