Classes C and D belong to the category of individual discharge.

Maximum allowable quantity of products discharged by individuals:

Combined fireworks

Similar combination and different combination: the inner diameter of a small fireworks tube is less than or equal to 30 mm; The inner diameter of cylindrical spray is ≤ 52mm; The inner diameter of conical spray is less than or equal to 86mm; The inner diameter of single tube for bead spitting is ≤20mm. Therefore, it is impossible for a manufacturer with Grade C production qualification to produce fireworks with an inner diameter of > 38 cm.