A 2.5-inch fireworks display shell typically refers to a type of aerial shell used in the firework industry to produce colorful aerial effects during a fireworks show.
Size and Structure: The shell has a diameter of 2.5 inches, which indicates its size and the scale of the display effect it can create
Effects: The effects can range from simple bursts of color to intricate patterns, including peonies, chrysanthemums, fish, and other shapes