Small pieces of metal, glass or other sharp objects may tear through paper or plastic bags and injure someone. Bullets stored in plastic may oxidize, destroying firearm striations. Boxes protect them from these hazards. The included cotton keeps the item from moving. Each box is 21⁄2" x 13⁄4" x 1". The boxes are 1-inch high and can be sealed with our evidence seals or tapes.Select from single or 50 pk using the pull-down menu.