... O.E: 3.3 colored borosilicate glass tubing Features:1) Available colors: clear , dark blue, light blue, amber, light yellow, green, pink ... , purple, red and opaque black ,opaque white.2) Regularly stocked tubing size ( ... us inquiry if you are interested in glass tubing, glass pipes, waterpipes and so on. LIGHT BLUE Borosilicate Colored Glass ...