6mm Sellier & Bellot Blanks ignite and propel pyrotechnic scare cartridges, such as bangers and screamers from the scare cartridge launchers. The Sellier & Bellot 6mm Blanks are both the cleanest and most reliable 6mm cartridges. They are also the most economical way to power 15mm pyrotechnic scare cartridges. These blanks reduce launcher fouling, ensuring a consistent ignition Other uses for this product include; as a standalone noisemaker for dog trainers, use in starter pistols, and for special effects.