Captain Fin: Jeff McCallum Glow Glass 9 Jeff is a master craftsman with a commitment to every aspect of the surfboard art from shape to color to glassing a surfboard it's hard to find the slightest flaw. This one will work great in your favorite longboard...and yes...it glows in the dark! Compatibility: US Fin Box Construction: Fiberglass Flex: Medium Fin Specification Size Area 34.99" Height 9.0" Base 5.45" Foil 50/50