Borosilicate glass tube 1.Material: Borosilicate glass 2.Size: 12x75, 13x75, 16x100, 16x150 3. Good Quality 4. Export prof Borosilicate glass tube1.Material: Borosilicate glass2.Size: 12x75, 13x75, 16x100, 16x1503. Good Quality4. Export professional package Borosilicate glass tube