Multi shot barrages are commonly known as 'Cake' or 'Single Ignition' which effectively a small or large display in a box.  Consisting of multiple tubes which are fused together so you only have to light once to produce a mini display that could last up to 2 or 3 minutes in some cases or be as little as 10 seconds. Tubes vary in size, orientation with a single or multiple effect types within a single cake that will provide a stunning visual display whether 1.3G or 1.4G.  Smaller cakes will have a smaller safety distance of 8 metres were as the lager cakes will require up to 25 metres safety distance.