Tannerite Brick (4 pack of 1lb targets)

"Permits: You should always check and follow all state, county, and/or local laws and regulations for any applicable permit or license requirements, or other potential restrictions and conditions in your area, for possession and use of Tannerite brand targets in unmixed and mixed forms. Tannerite states they make the safest and most stable binary exploding targets on the market. To achieve this level of quality, all targets are made in the U.S.A. with the finest materials available. Follow instructions included in your package carefully and accurately."