Improve your shallow water paddling experience with a 2-pack of our 6" deep river fins. They have the same design as our standard 'Hook + Pin' fin, but with a shorter depth to accommodate shallow water conditions like rivers. Our fin is specifically crafted with fin security in mind. We understand the frustration of poorly constructed inflatable paddle board fins that fall or scrape off and end up lost in the water. That's why our specially designed hook provides a superior hold, and the securing pin attached to the fin with a string ensures extra stability. You can easily hook the fin into your board fin box, pull it back and securely fasten it to the board with the pin. Our fin is compatible with all Tower inflatable paddle boards, and it's a shorter alternative to the 9" deep fin included with all original Tower iSUP packages.