DICE 20-Sided (D20 Polyhedral) BLACK Transparent _ Bundle of 20 Dice Set of 20 Black/Smoke (Polyhedral 20-sided) Transparent Dice. Multiple uses for games, countdown dice, math exercises. NOT a stand alone game. Bright black/smoke partially transparent dice. Numbers are recessed into dice for longer lasting life (as opposed to silk-screened on the surface.) Dot marks at base of numbers "6." & "9." to distinguish between the two look-alike numbers. Approximately 3/4 inch wide.