The Curved Magnum Shader Needle Cartridges by Turbo are offered in sizes both standard #12 and bugpin #10 gauges/diameters providing versatility for both broad shading and finer, detailed work. The curved configuration of the magnum needles allows for a more ergonomic application of ink to the skin, promoting even distribution and reducing skin trauma. This design is especially beneficial for large area fill-ins and smooth gradients, making it a preferred choice for artists looking to achieve a high level of detail and saturation in their shading. Turbo ensures these cartridges are compatible with all industry-standard machines and grips, emphasizing ease of use and flexibility. The spring system within these cartridges facilitates needle retraction, offering a balance between flexibility and control during tattooing sessions. However, it's important for artists, particularly those using tattoo pens, to note the lack of a membrane in these cartridges, which may present a minimal risk of ink blowback. This factor necessitates careful handling to protect the longevity and performance of tattooing equipment.