Fireworks that have been approved by the
 US Consumer Product Safety Commission (CPSC). Fireworks that are approved by the CPSC must be able to withstand 350 degree temperatures for two days, must not be able to explode with mechanical shock, are limited to 500 grams of composition, and can not contain aerial bursts that have more than 130 milligrams of flash powder. If the item has not been approved by the CPSC, it can not be classified as consumer fireworks.