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We are factory specializing in the manufacture and export of glass tubes made of borosilicate glass3.3 specially used for solar water heater in China. Our solar glass tubes enjoy a market share of more than 25 per cent in china and their quality ranks first in the same industry in china.We also have R&D staff to customize our products according to client's order. And expressly, our price is very competitive because we are manufactory, we are the source.