Versatile RTM construction delivers a consistent feel similar to a traditional fiberglass fin, but with the advantage of reduced weight. The stiff flex pattern extends progressively from the base through to the tip helping the surfer to maintain drive and hold through a turn. Fin Specs (Thruster Side Fins). Base: 4.45 inches / 113mm. Depth: 5.32 inches / 135mm.Area: 18.12 inches² / 11690mm². Fin Specs (Quad Rear Side Fins). We work with a core network of distributors and suppliers to ensure that our customers get the best price and fastest service available. The item "FCS II GERRY LOPEZ TRI QUAD SURFBOARD FIN SET" is in sale since Thursday, March 30, 2017. This item is in the category "Sporting Goods\Water Sports\Surfing\Surfboard Fins". The seller is "buysellshred" and is located in Arlington, Virginia. This item can be shipped worldwide.