Offering HAIRLICIOUSLY Micro Needling Dr Pen TITANIUM Needle Replacement Cartridges for your Dr Pen's needs! The titanium needles have 12 pins for creating maximum micro-tears on the scalp for hair growth. Each needle cartridge is carefully sealed. Titanium is more durable and the stainless steel needles and will last longer! Comes in either 10, 20, 30, 40 or 50 needle packs!