These devices are a long, narrow tube with a lengthwise slit that projects a fan-shaped pattern of color or color with silver sparks or crackle. The pattern differs from a mine in that the pattern is wide side-to-side but is very narrow and controlled from front to back. The slit is covered with a REMOVABLE tape to prevent leakage during shipping and handling. The duration is a very quick 1.5 seconds. Great device for areas where a typical mine is not bright enough or where ceiling height is limited.
.75" od x 18" long, slitted paper tube (igniter installed, standard length 1 ft.)