Undead Apocalypse Zombie Serum 20g Airsoft Marking Ammo, 2,200ct: * Consistently round * Dry lubricant coating * Mark is water soluble, for easy clean-up between skirmishes * Specifications: * Caliber: 6mm * BB weight: 20g * Count: 2,200 * Material: synthetic * Compatible: 6mm Airsoft Rifles and Pistols