Amazing hollow ring effect 60 Gram 6" artillery shells. Color changing with LOUD breaks! A very nice addition to any show. 
 
Six shells with follow effects:
1) Hollow blue to silver glitter
2) Hollow color dahlia with crackle
3) Hollow gold willow to blue
4) Hollow sky blue to green
5) Hollow brocade crown
6) Hollow crackling red palm