The Powerstroke® 3 Coated Bottom Black Dot™ features midrange and
  low- end resonant tones with increased durability. Inspired by
  legendary drummer Steve Smith, the Powerstroke® 3 Black Dot™ is
  constructed with 10-mil Coated film and a 10-mil inlay at the
  outer edge of the head to subtly dampen unwanted overtones. The
  added 5-mil Black Dot™ provides deeper low tones and focused
  attack.
  - Ideal for all Bass Drum applications
  
 
  - Available in sizes 18" - 26"
  
 
  - 1-ply 10-mil Coated film with 10-mil inlay ring with Bottom
  Black Dot™
  
 
  - Inspired by legendary drummer Steve Smith
  
 
  - Dampens unwanted overtones creating a perfect balance of
  response and tone control for bass drum applications.