pyrotechnic effect which fires a stream of hot sparks straight out of one end of its tube. The effect usually lasts several seconds. The fallout is usually hot, and gold or silver are the commonest colours.
A tube which creates a fountain (shower of sparks) effect. Gerbs can be used in firewriting or other specialist effects (e.g. waterfalls).
a version of the Roman Candle firework, throwing a shower of sparks into the air