TrollBarrier is a protective cover to be used on most composite guns to protect the surface of the composite gun from contact from the patient during use. The barrier reduces the need for autoclaving between patients. CDC recommends barriers be used on clinical contact surfaces and equipment that are in contact with the patient and are at risk of being contaminated. Simply reapply a new barrier between patients. FEATURES: Fits most composite guns Fits over the entire gun Creates no extra volume around the sensor & holder Easy to remove after treatment