●Needle Material: High quality Imported Japanese medical grade stainless steel which are more sharp, smooth and without damaging skin, seldom fork, twice as durable as ordinary needles. ●Shell Material: Medical grade PC material shell which could reduce the friction between the needle and the housing tip to prevent the power of the plastic brought out, more hygienic and safe ●Membrane: Medium tension safety membrane and 3 rings silicone membrane technology, more tightly combined with the membrane cap to Prevent ink Back flow can better protect your tattoo machine ●Large ink storage capacity smooth and uniform ink discharge without ink jetting, the round liner needle can tattoo longer line ●Square designed plastic bar fix needles stably, and make the Needle more stablewhen you are lining ●Non-slip strip design for the body of shell, and Ergonomic Design for the back of cartridges. ●Color caps for easy identification of the tattoo needle configuration, help you find the right tattoo cartridge quicker and work even faster. ●Emalla Eliot Pro Cartridges productionand assembled in the most hygienic condition 100% sterilized by E.O. Gas.