borosilicate colored glass tube Available colores :clear ,dark blue,light blue,amber, ... :artistic building material Use: home decoration /adommentPersonality :green&healthy products Colored borosilicate glass Available colores :clear ,dark blue,light blue,amber ... -100°C)1.2w/m2k7Refractive index0.921Main CompositionSiO2B2O3Na2O+K2OAl2O3811342 borosilicate colored glass tube