... Clear, green, blue, red and multi-color glass stack column: 1, Material: Optical glass.2, Good whiteness, transparency, refractivity and hardness.3, No pollution ... the performance.5, A new interior decoration material for commerce and house. Used as space partition, wall decoration etc.6, ... Have colors such as clear, green, blue, red and multi-colors.7, The transect are round, square, or octagon ...