网页aijiren Tech™ National™ and aijiren Tech™ Chromacol™ Sample Storage Screw Thread Vials are manufactured from superior quality 33 expansion borosilicate clear (Type 1, Class A) or 51A amber (Type 1, Class B) glass. Storage vials range from 2mL to 40mL. Order as individual sample storage vials and closures or as unassembled