One of the main factors that led to the creation of KWADRON® cartridges was the desire to create a product that has the highest usability, and above all the highest quality unattainable for other brands. All needles have a membrane and sterilized until 2027. Brand: Kwadron Cartridges Needle Size: #12 (0.35mm diameter) Needle Type: Round Liners Needle Taper: Longer Taper, & Medium Taper Needle Polish: Smooth & Textured Box: 20pcs/box