1.good material 2.cheap price We offer borosilicate glass tubes and rods with various colors and size . C.O. ... white, opaque black, transparent black, Dark blue ,light blue, amber, yellow, green, pink,Purple, redRegularly stocked tubing size7x1.5mm,8x1.5mm ... bottles of top-quality, decoration, fitment and so on. borosilicate yellow glass tube