Glow in the Dark Dice Set, Luminous 6-Sided Dice for Board Games, Party Supplies, 16mm Features: Warm Tip: Place the dice in the sun for a good luminous effect. Similarly, dice in the dark can also achieve the night luminous effect; the luminous effect depends on the brightness of the surrounding light; the darker the surroundings, the better the luminous effect. Safe Material: The glowing dice set is made of acrylic and phosphor, non-toxic and tasteless, so it will not cause any harm to the human body. Permanent Luminous Effect: The 6-sided dice have a continuous luminous effect; generally, if the dice fully absorb light energy, they can continue to glow in the dark for 2-3 hours; when the energy runs out, they can glow again by repeating the absorption of energy. Wide Occasion: The dark dice can be used in a wide range from casinos, board games, or just as table decorations. The decorations of black dots allow you to have many options in party theme ideas. Attractive Appearance: There are 10 pieces of luminous dice with a nice appearance, feel, and rolling performance. Specifications: Material: Acrylic Size: 14mm/16mm Note: Please allow 1-2 cm error due to manual measurement, please make sure you do not mind before ordering. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 10 pieces of luminous dice Note: All data is measured manually, please allow 1-3 cm error, due to the difference in light and display, there will be a certain color difference, the actual item received shall prevail.