EVI-PAQ, a brand of Armor Forensics, has introduced an evidence box with a window that allows users to view evidence without altering the chain of custody or unsealing the items. The windows allow anyone to record important information, such as firearm serial numbers, from the evidence without risking contamination. These boxes are as strong as regular Evi-Paq evidence boxes and feature polystyrene windows with a cardboard flap that folds down to protect the window from being punctured or damaged. The box also includes pre-punched holes in the back to allow easy tie-down of evidence.