Olympic SILVER 20-sided (D20) Dice _ Bundle of 20 Identical Dice Beautiful, olympic Silver swirl, twenty-sided (D20) dice with black numbers. Perfect for adventure games, math skills, collectible or use creatively. Recessed black numbers provide for long lasting dice. Bundle of 20 identical Silver swirl D20 dice. Icosahedron is the techie name for a 20 sided dice . Each numbered face is an equilateral triangle.