After insects have been properly pinned and labeled, they are kept in specially designed insect boxes constructed with soft flooring into which pins can be inserted. Pinned insects cannot be stored in good condition for long unless they are placed in boxes to protect them from dust and damage. A standard display box is 18 x 24 inches (outside measurements) and 21/2 to 3 inches deep to allow insect pins to stand upright. It is protected on top with a glass or Plexiglas top. Figure 24 shows a box that is simple and easy to make. Standard display boxes also are available from entomological supply houses, or 4-H leaders may know of local suppliers. Use caution if Styrofoam is used for the bottom of display boxes, because the protectants described below may melt this material if contacted directly.