Higher positioning and standards Quelle is better cartridge needle brand, made of high quality stainless steel & medical grade materials. all needles have been sterilized by ethylene oxide before sale, and has passed the CE test and certificated. Quelle needles have been tested by some famous tattoo artists, and keeping on improved with the newest trend and technology. Quelle Cartridges allow you to exchange needle cartridges quickly, safely, and easily. Your tattoo machine is ready to go in seconds, but you can also switch effortlessly between the 68 different configurations while you’re working. Our sterilization process and hands-on quality inspections by experienced experts make sure a long shelf life of up to 4 years. You can switch between your favorite configurations without worrying about the hygienic aspects. Our Cartridges are sterile, individually packaged, and intended for single-use – safe and easy!