The Firewire Machado Seaside Quad Surfboard Fins. Being 15% lighter then Rob Machado's pervious quad sets, and newly built using bamboo and innovative carbon veils to control flex and drive, this newly reimagined version of Rob's popular quad set was engineered to have a wider sweet spot then any fin set he's ridden previously. Designed to be ridden with any shape in your quiver from 5'2 Seaside to a 7'0 Seaside and Beyond.