Made of steel sheet with foam padding in the lid. A safety lock prevents accidental opening. Features a removable, labelable assortment compartment. The system compartments include: 12 pieces measuring 54 x 54 x 63 mm in red, 6 pieces measuring 54 x 108 x 63 mm in yellow, 3 pieces measuring 108 x 108 x 63 mm in blue, and 2 pieces measuring 108 x 162 x 63 mm in green. Available replacement boxes are: 54 x 54 x 63 mm in red, 54 x 108 x 63 mm in yellow, 108 x 108 x 63 mm in blue, and 108 x 162 x 63 mm in green (not included).