Good quality reasonable price. Last price is depends on customers qty and reuqriements,3.3 high borosilicate glass tubes

the stability of the internal structure of the glass extremely well, can better withstand the higher Temperature difference

Has excellent physical and chemical properties,the stability of the internal structure of the glass extremely well,can better withstand the higher Temperature difference.Silicon content: 80% or moreStrain temperature: 520 °CAnnealing temperature: 560°CProcessing temperatures 820°CSoftening temperature 1220°CWater resistance Level 1