Luckicup 102 regulation size dice cup set includes 5 5/8″ dice and 1 full size professional dice cup known the world over for its superior qualities. The 5/8″ premium dice are made of unbreakable urea white plastic. The Luckicup 102 regulation size dice cup is designed for perfect tumbling of the dice and is the quietest dice cup on the market! It is crush proof, has a ribbed lining that provides for good rolling of the dice. They have an air cushioned top and bottom plus a thick rubber sponge inside for noise reduction.