When?these 1-3/4"?Shell bursts, what you are seeing are hundreds of burning 'pearls', carfully crafted pellets of chemical combinations that burn to create the mesmerizing lines of color you see in the sky. Richness of color, an extended pearl burn-time, and a 'round' burst are just some of the qualities that set great Shells apart from the rest. In the tradition of Display Aerial Shells, Exceptional Artillery (AS-1) is a selection of carfully designed and crafted Single Artillery Shells that aim to reach the status of 'exceptional' by achieving all the above criteria - a full and round burst, excellent duration and rich, bright colors. With these qualities fulfilled, AS-1 is sure to be a vital part of any display design. The design of prefessional firework shows is largely based around the arrangement and firing sequence of the Display Aerial Shell- the big brother of the Artillery Shell. It is of little wonder that the quality of the Aerial Shell is paramount to the discerning pyrotechnician. Case 12/12