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The Koalition Malachite Medium Double Tab Thruster Fins in BlueProduct Information:• Product Code: K2087-ASTD• Fin System FCS - Double Tab• Set of 3 fins• Base : 4.61″ – 117mm• Depth : 5,50″ – 139,5mm• Surface : 25,05″² – 16160mm²• Sweep 39°• Foil Flat + Bevel