Single box of 20 Cartridges – 19 Curved Magnum Open  (.35mm Diameter, Long Taper). Helios Red Cartridge Needles are the perfect choice for the professional artist. Helios needles are made with a safety membrane to prevent the back flow of ink into your tube or machine to give you an ultra-smooth feel with just the…

Single box of 20 Cartridges – 23 Curved Magnum Open  (.35mm Diameter, Long Taper). Helios Red Cartridge Needles are the perfect choice for the professional artist. Helios needles are made with a safety membrane to prevent the back flow of ink into your tube or machine to give you an ultra-smooth feel with just the…