Firewire Mango Jam Thunderbolt Silver Tech Surfboard Features: I'm really in love with the Mango Jam at the moment. It's basically a modern single fin.I called it the Mango Jam because its made for jamming on. It turns so sharp and hard, much better than a traditional single fin. That's because the Mango Jam has a lot of updated and refined elements that give it some modern influence.The waves I prefer most for this shape are around knee high and up, but it really starts to feel alive with its full potential when the waves are head high to shoulder high.The Mango Jam is probably my favorite board right now.Fin SystemSinge Fin Long Box ( Fin Not Included)Dimensions