2 (two) tubes of 10 - 20 paint balls Permanent marking, oil-based Paintballs. Gelatin shell filled with bright glo oil-based fill. Designed to be fired from a .68 caliber paintball pellet gun to mark hard to reach targets from a distance. Can be used to mark trees, buildings and other structures from a distance or over difficult to traverse ground. Not for recreational use! Not for use against humans or animals.  Cannot be used on Paintball fields!Always use under proper supervision.