Four Stars Glass Co., Ltd. has engaged in pharmaceutical packaging container industry for nearly 20 years and dedicated itself to continuous research and innovation for leading pharmaceutical glass packaging materials and containers. In particular, Four Stars highlights its new developed borosilicate glass tubing which has doubtless reached all the requirements for neutral borosilicate glass tubing conformed by USP TYPE I. Its physical and chemical properties as well as the tolerances of outer diameter fully meet the international specifications. The authorized SGS has also issued testing certificate to approve its borosilicate glass tubing as USP TYPE I.Cangzhou Four-Star Glass tube Co.,Ltd is the first manufacturer for neutral glass tubing in China,and also the glass tubing exported many countries,for example Russia.India.Mexico.Korea and so on.Welcome to visit our website or if you have any questions please feel free to contact us,we'll suppy you good quality glass products and best service.