glass block, clear and colour, transparent or opaque, using in wall partitions, glass block, glass brick, size :190x190x80mm,190x190x95mm, are available in various colour: clear, blue, green, brown. They can be using for interior and exterior wall partitions, characteristics:1.new technology, new generation, it can be more suitable for building usage.2.low heat conduction, fire proof, corrosion ...