There are 24 of the Miracle Fireworks 6" ANNIHILATION canister shells to a box and 3 boxes to a case.

This shell kit is a great assortment of great 6" shells:

6 double break shells,
6 double line shells,
6 ring shells and
6 nishiki willow shells.

This platinum grade kit is Miracles biggest and loudest.

See performance Video below