What separates Helios from other needle cartridge brands is the combination of their ultra-smooth feel, just the right tension, and a fair price.
Helios recently released a new model of cartridges called 'Helios Red Label'. These red-tinted cartridges feature a membrane system which replaces the original rubber band model. Membrane cartridges are considered to be a safer system that stops any back flow of ink entering the grip.
Use them with any cartridge grip. Each box contains 20 cartridges.