ScubaPro Jet Adjustable Fin - BlackJet Adjustable Fin Black SCUBAPRO's JET FIN is famous. This distinctive fin design set the standard for power and durability when it was first introduced 50 years ago. Its durable rubber construction and beefy shape can still be seen on dive boats, research vessels and in the world's most remote dive locales. Tech divers, deep divers, military divers, commercial divers and dive instructors, as well as old school recreational divers, still strap on a