COE 3.3 high quality and low price 10 years production experience 15000 tons production capbility per year ecofriendly colored borosilicate glass rod:Regular diameter of glass rod: 4-30mm; regular length: 1200mm Colors available: red, opaque black, opaque white, pink, purple, green, yellow, light yellow,amber, dark blue, light blue,transparent black ,cognac, golden champagne jade white e.t.c ...