Professional Serum 5ml Volume: 1 x 5ml Calecim Professional Advanced Stem Cell Hair Regrowth Serum This listing is for one vial as shown in silver foil packet with size listed as O0.169 oz please zoom to confirm. Stock photos added to show bottle style. Contains powerful PTT-69 that stimulates hair growth by activating the hair follicles, and managing signs of inflammation that causes hair shedding. Optimizes hair follicle function Stimulates hair regrowth Boosts hair density and reduces hair shedding * recommended to use a micro needle stamp in advance of serum application to assist with penetration.