National Metallic Styrofoam Trays for CB Ammunition Boxes are excellent for securing ammunition. Caliber-specific styrofoam trays are designed to hold ammunition with the tip down to protect the point during travel. Select your capacity and cartridge knowing these trays are made to protect and preserve your ammo until you need it. Combined with the National Metallic CB Boxes (Sold Separately), these provide excellent storage options for all your favorite ammunition.