Recommended for patrol operations, remote field operations, precinct and squad room testing operations. The 50-Pac is a good routine investigation kit for presumptively identifying opium alkaloids, amphetamines, demerol, barbiturates, LSD, and marijuana. This kit allows for two levels of screening for many substances. Contains 50 individual presumptive tests. One box each of Tests A through E One box of Acid Neutralizer (Test F)