Warning all Dum Bums are LOUD!
Dum Bum fireworks by Klasek are salute fireworks.
They have the added effect of a lovely silver mine but the main effect is a loud report (bang).
The first number is the amount of reports (bangs) the second refers to the tube size (3 = 30mm), the bigger the tube the louder the bang.
This has 200 x 30mm reports