The hair cell system provides sensory information for the vestibular and auditory systems. The hair system also protects against abrasion and exposure to UV radiation. Dermal papilla cells, germinal matrix cells, inner and outer root sheath cells, and follicular keratinocytes are vital components for normal hair development and growth. Abnormal cell regulation within the hair cell system contributes to the development of disorders such as alopecia. We offer 5 types of normal human primary cells in the hair cell system including; hair dermal papilla cells, hair germinal matrix cells, inner and outer root sheath cells, and hair follicular keratinocytes.