BIOTOC Medi NANO Chip is a patented silicon chip that when used in conjunction with the Medi Nanopen-Pro device creates microchannels that increase the absorption rate by 436% and close after 20 minutes reducing the risk of infection and recovery time.Product Features:Individually sterilized and packaged for safetyDesigned with nanotechnology, its needle length of 0.2mm reaches the bottom of the epidermis or top of the dermis layer depending on skin composition and intensity level of applicationAllows full coverage including hard to reach areas around nose and lips with its 4 x 4mm area