For those of you who are hooked on Quads, our STC - Carbon Base Quads are now available. Constructed with the same technology and materials as our Phase 3 fins, they have a strong carbon base, hex core inner and flexible tip characteristics that give awesome performance when you need it. These quads are supplied as a rear set to be used in conjunction with your Phase 3 Carbon Base Fins. Coming in at a super-light 107 grams per set, they are designed to give you the speed and maneuverability that you expect from having a quad set up. Enjoy!