T4e, training 4 engagement, has developed a line of markers for training and protecting.On the protecting front, these.50 caliber pepper (oc) balls fit.50 caliber t4e markers to provide highly effective deterrents.These pepper balls have a tough outer shell that is designed to break with high-speed impact.T4e pepper balls are red and white-colored and sold in a 10 count tube for easy and safe storage.Caliber: 50Quantity: 10 PackMaterial: OC SprayHazair: Yes