Aquarian 26" Performance II clear with Power Dot on top, PFPD26 26" Bass Drum Head, a clear, two ply head with Power Dot on top for added durability, manufactured with Aquarian’s Vacuum Process which eliminates air bubbles and wrinkles between the two plies, the Performance II drumheads were designed for "loose" tuning to get the depth and punch with no "over-ring", this drumhead is sealed around the edge to create that really deep sound on the Bass Drum,