Borosilicate glass tubing, good material is used for good quality:
High Resistance to Thermal Shock
High Hydrolytic Resistance
High Chemical Resistance
Physical performance

Coefficient of mean linear thermal expansion(20,300) 3.3+/-0.1 10-6K-1
Transformation temperature 525+/-15
Softening point 820+/-10
Working point 1260+/-20
Density at 20 2.23+/-0.02g/cm3
Mean thermal conductivity(20-100) 1.2w/m2k
Refractive index 0.92

Main Composition
SiO2 81
B2O3 13
Na2O+K2O 4
Al2O3 2

Chemical Property
Hydrolytic resistance at 98 ISO719-HGB 1
Hydrolytic resistance at 121 ISO720-HGA 1
Acid resistance Class ISO1776-First Class

Application:
Lighting: flameproof light fittings others
Gifts: decoration/grappa bottles Candlesticks Lanterns Others
Interior Decoration: Towel rails
Furniture Fittings
Others