Plastic. Case for Protecting Guns & Ceramic Bead Trays. This is a new plastic case. Great for protecting guns and ceramic bead trays. Comes with 2 plastic latches and foam eggshell inserts. The outside dimensions measures approximately 13" x 8 3/4" x 3" (33 x 22.2 x 7.6 cm). The inside dimensions measure approximately 12 1/2" x 6" (31.75 x 15.24 cm).