This compact kit is designed to fit inside of another box or briefcase or in the glovebox of your patrol car. The jars of powder in this kit are the 90 cc wide-mouth jars for convenient use with the magnetic applicator. The Gem™ Fluorescent Magnetic powders have the benefit of being dual-use, meaning you can use them as a standard black magnetic fingerprint powder, but they also fluoresce like Blitz-Red™ and Blitz-Green™ when viewed with a laser or Forensic Light Source. It is recommended that latent prints developed with fluorescent powders are photographed before a tape lift is attempted. View our Technical Note for more information on photographing latent prints developed with fluorescent powders.