PB – Structure and Functions of the skin(KCBT) You must first complete PB – What Are Precision brows?(KCBT) before viewing this LessonPlease sign up for the course before starting the lesson. PB - Consultation(KCBT) PB - The Causes of Hair Growth(KCBT) Back to: Precision Brows Course(KCBT) > PB - Manual (KCBT)