Koplow Games 22mm (7/8) Backgammon Doubling Cube, Green with Gold by Koplow Games Backgammon Doubling Cube 22mm (7/8) Green Marble Color With Gold Numbers (1 Dice) Green Marble Color With Gold Numbers Backgammon Doubling Cube 22mm (7/8in) Doubling Cube with the following numbers: 2, 4, 8, 16, 32 and 64. This is for 1 Die