Lucky Supply Cartridges feature a medical-grade housing that includes the HIGHEST-QUALITY 316L needle pins that have been crafted into meticulously inspected configurations. They are outfitted with an advanced membrane technology that prevents any ink spit-back. Instead of a small ring, the entire cartridge body is color-coded for easy and quick identification between liner, round shader and magnum groupings. Every box includes 20 EO Sterilized cartridges for a price that won’t break the bank.