Practice canister allow users to increase familiarity, boost confidence and improve accuracy to use SABRE confidently in an emergency. It has a spray pattern advantage that greater respiratory and also has reinforced safety that prevents accidental discharge. It weighs 0. 16 ounces with approximately 8 bursts at 6 to 8 feet with a cone spray pattern with a point of aim to the center of face. Expiration Date: 4 years from date of manufacture.