The best top quality 2" shells cake every for a professional level cake in the United States thats Professional fireworks aready but it would not pass the classifications because that cake is over Max over Max overloaded overloaded powder powder plus how you guys tell the firework factories in China to make your fireworks to compact all the firework tubes on all the cakes in China for you guy they make for you guys in Europe they over loaded loaded powder powder in China in all your guys fireworks thats why all your guys firework in here is Max loaded with powder and the best