borosilicate glasstube: material:borosilicate glass inner diameter:8mm--500mm function:resistent to high temperature and press usage:manufacturing,other And we can also make as per your requirement. Please don't hesitate to contact us if you are interestedin our borosilicate glass tube. It's a great pleasure to establish a happy and successful business relationship with you in a long term. We shall supply youhigh-caliber products with best serive and reasonable price.We believe that through our effort we'll become your reliable supplier and best cooperator of your business.