Designed and exclusively owned by Porter's Fireworks, the Knitro Pyro Series of fireworks separates itself from all others "Pro" series consumer fireworks. These are our famous, full bodied, heavy break and hard hitting Warhammer shells with a twist...NEON! All the greatness of the Warhammer with the added effect of intense neon colors in all effects! They're not onlly big, they're beautiful!