Colored 3.3 Borosilicate Glass Tube

We're the sole manufacturer of Colored 3.3 Borosilicate Glass Tube in China even the world so we can assure you the best price. These Colored 3.3 Borosilicate Glass Tube are widely used in lab, glassware, medical packaging, arts&handicrafts and so on. Most of the India manufacturers import our colored glass in large quantity from us monthly. colored 3.3 borosilicate glass tube 1.resist high temperature ,525C. 2.green,contain no heavy metal. 3.very hard. Features: 1) Available colors: clear , dark blue, light blue, amber, light yellow, green, pink, purple, red and opaque black ,opaque white. 2) Regularly stocked tubing size (diameter x wall thickness): 25 x 4mm, 32 x 3.2mm, 32 x 4mm, 38 x 3.2mm, 38 x 4mm, 44 x 4mm, 51 x 4mm, 51 x 4.8mm 3) Customized sizes could be made 4) Regularly stocked rod diameter: 4mm - 35mm Main composition: 1) SiO2: 80A 0.5% 2) B2O3: 13A 0.2% 3) Al2O3: 2.4A 0.2% 4) Na2O(+K2O): 4.3A 0.2% Chemical properties: 1) Coefficient of mean linear thermal expansion (20A C/300A C): 3.3A 0.1 (10-6K-1) 2) Transformation temperature: 525A 15A C 3) Working point: 1,260A 20A C 4) Softening point: 820A 10A C 5) Density at 20A C: 2.23g/cmA 6) Hydrolytic resistance at 98A C: ISO719-HGB1 7) Hydrolytic resistance at 121A C: ISO720-HGA1 8) Acid resistance class: ISO1776-1 9) Alkali resistance class: ISO695-A2