It is made of high quality stainless steel, durable enough for your daily using For optimum safety and quality, you can trust these tattoo needles which have been sterilized Needle sharps made of type 316 stainless steel with alloy addition of molybdenum prevents specific forms of corrosion Needle bar made of type 304 stainless steel the most common grade (3Rl, 5rl, 5rs, 9rs) 25 each