Aquarian Regulator Resonant Head - White. Black head shown in photo. 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. These heads come with a 4 ¾" hole off set.