20 Pieces 12 pin Needle Cartridge for Dr.pen A6, Mysweety Microneedles for Electric Derma Microneedle Stamp PenONLY FOR A6 Dr. Pen Derma Pen These replacement Needle Cartridges Only Fit For A6 Dr. Pen Derma Pen Electric Auto Microneedle Therapy System. HIGH GRADE STAINLESS STEEL Best beauty tools for face and body skin care. INDIVIDUALLY PACKED Use a new one each time, don't reuse. PACKAGE INCLUDED 20pcs replacement derma pen needles (NOT INCLUDED the a6 dr. pen machine). ONLY FOR PERSONAL USE don't share with others in order to avoid infection.