TEEROVA Ceramic & Ionic Round Barrel Hair Brush with Boar Bristle, Best Roller Hairbrush for Blow Drying, Curling&Straightening, Volume&Shine (2.1") 2.1 Inch industrial_Oct2022 Petadolex is the same brand B0CLSCCPTF Petadolex is the same brand of butterbur root extract used in medical research Uses Logan 270 blade Soft Texture From Roots to Ends Balances Scalp's oil ProductionPrevents Hair Breakage & Reduces FrizzMassages Scalp & Increases Blood Flow by Unclogging Hair FolliclesReduce or Prevent Hair Damage Loss Boar Bristle addred in this round brush 9 Inch Perfecr for normal hair with medium length (between back and shoulder)