These single ply, resonant bass drumheads feature Aquarian's patented "Floating Muffling System." They are perfect companions for the Super-Kick™ and Impact™ series batter heads. The Regulator™ heads are available in Video Gloss black or white. They are available with a large 7" hole in the center, a 4 ¾" hole off set, or a full head with no hole.