Vials are made from superior quality 33 expansion borosilicate clear (Type 1, Class A) glass, and meet all US, EU and JPN Pharmacopia standards. Product Size: Pack of 100 Type: MacroVial Fused Insert Vial, Clear Glass Vial Closure Size: 9mm Vial Volume (Metric) 475µL Description: MacroVial 350µL Fused Insert Vial, Clear Glass