1.good material 2.cheap price We offer borosilicate glass tubes and rods with various colors and size . C.O.E3.3±0 ... .8mmNote: standard length of clear tubing:1500mm; standard length of colored tubing:1220mmApplicationglass bong, waterpipe pot,,lightingtubes, chemical lab tubes, scientific ... bottles of top-quality, decoration, fitment and so on. borosilicate colored glass tube