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The Chemistry surfboard fin was designed by the Chem Crew with art by Paser. "The Chemistry "Colab 2" is a template that we designed for the high performance surfer who wants drive and the right amount of release. With it's wide base, smooth rake, and medium sized tip, The Colab 2 goes well in all types of surf. This fin is a med/large fin with a 4.49" base and 4.73" height."