Sample vials, E-C, WHEATON®. Supplier: DWK Life Sciences. Description: Clear vials made from low extractable borosilicate glass that provides superior chemical resistance. Conform to USP Type I and ASTM E 438 Type I, Clas ,218-2261EA,WHEA224710EA,WHEA224732EA,215-3575EA,215-3576EA,218-2268EA,215-3573EA.