1.good material 2.best price We offer borosilicate glass tubes and rods with various colors and size . C.O.E3.3±0.1(10-6k-1)Available colorsClear , milk white , opaque black,transparent black,silver champagne,gold champagne,dark blueblue B, blue C,blue D,blue E, blue EE, amber, yellow C, yellow D, green, pink, purple,Regularly stocked rod size3mm - 46mmNote: standard length of rod :1200mm; ...