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About product and suppliers:
        Alibaba.com offers 19 glass tube usp type 1 products. such as free samples. 

There are 19 glass tube usp type 1 suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of glass tube usp type 1 respectively. 

Glass tube usp type 1 products are most popular in Domestic Market, Southern Europe, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 19 with Other, 11 with ISO9001 certification.