MO Tattoo Cartridges, also named MOLONG MO Tattoo Cartridges in the product listings, are available in the four configurations shown on this collection page: Round Liner (RL), Round Shader (RS), Magnum (M1), and Round Magnum (RM). Each listing is presented as a 20-piece box and includes the terms soft membrane tattoo cartridges and finger ledge. This makes the page useful for artists comparing MO cartridge formats for liner, shader, magnum, and round magnum work. The collection is organized around the MO series rather than a mixed needle range, so the product family and configuration are easy to identify before opening a product detail page. Check the product listing for the available needle size, price, and variant, then match the cartridge with the tattoo machine or pen used in the studio. Product details on the individual listing take priority for final selection.