Aquarian Super-2 drumheads sound louder, fuller and more powerful than conventional two-ply heads. They have great attack, projection and depth unlike any other drumheads. The patented Safe-T-Loc hoop prevents the head from slipping and the "Sound Curve" collar design provides "Responsive Tuning." With "Responsive Tuning," one turn of the drum key and the Super-2 heads react. A free tuning sheet is enclosed with Super-2 drumhead. Attack, projection, resonance, and "Responsive Tuning" are what Super-2"s are all about.Includes 10", 12" and 14" heads Clear heads provide: Wet attack Lots of bottom end and depth