Wheaton* Serum Tubing Vials

Vials have a blowback feature in the neck and bottom radius where freeze-drying applications are indicated. Shipped in shrink-wrapped modules to greatly reduce particulate contamination. Clear vials are manufactured from Wheaton 200 low borosilicate glass tubing to hold uniform wall thickness. Meets ASTM Type I, Class A and USP Type I standards. Amber vials are made from Wheaton "320"� borosilicate glass, and meet ASTM Type I Class B and USP Type I standards.