1Cartridge Needle: Needle set is an all in one solution for professional tattooists, high needle wire compatibility and large ink storage space without ink spilling. 2Maximum Needle Length: Needle set supports up to a 5mm maximum needle length, making it the perfect solution to compensate for insufficient machine stroke length. 3Individual Package: Designed with individually wrapped, cleaned with rigorous procedures and cleaned before factory shipment, making it safe and hygienic for tattooists and clients alike. 4Precise Assembly: Shader cartridge needle use standardized production lines to guarantee accuracy during assembly and provide convenient for you. 5Stainless Steel: Constructed with stainless steel and PC material, heat resistance, low temperature resistance, corrosion resistance and can be used for a long time.