neutral borosicilicate glass tubing for phamaceutial package

The expansion coeinfficient of neutral borosicilicate glass tubing is 4.9 +/- 0.1 10-6 K-1,and Acid esistance is Class I1,the Alkali Resistance is Class A2.It's can be used all kinds of ampoules and vial,and the quality is much better than low borosicilicate glass.It's the first choice for phamaceutical package.