I was using these as thruster fins for my G-Skate. I'm selling them because I've decided to part with my G-Skate, and I've used them three times. They are still in very good condition. I can add more photos if needed, so please let me know. Please refer to the manufacturer's description below: Dane DD2 Channel Islands has created the perfect thruster set for the Dumpster Diver 2. The front fins are the same as the AM2 template, and the back fins are smaller and more upright. This is effective in loosening up hip movement and giving a 2+1 feel. The fins are made of fiberglass and have a "classic and timeless design." The DD2, a collaboration design between Dane Reynolds and CI, provides more pivot and maneuverability while retaining the reliable drive and control of the original AM template. Retaining the reliable drive & control known from the AM template. Type: Fins Fin System/Fin Box: FUTURES Number of Fins: Tri-fin