Godox AD300 Pro Adapter Ring AD-AB. The Godox AD-AB Adapter Ring is required to screw the speed ring directly onto the Godox AD300 Pro flash head. The adapter ring is easy to install and is required to attach optional Bowens, Elinchrom or Profoto speed rings to the flash head. The speed rings are the same as those used on the AD400 Pro. Characteristics Adapter ring for the Godox AD300 Pro Allows use of Bowens, Elinchrom and Profoto speed rings Simple installation