Complete Package, 0.5-2mL Tapered Microwave Vials, 16mm OD X 83mm Long. Perform microwave-heated reactions in glass vials secured by 20mm aluminum seals w/0.125-inch thick, blue PTFE/white silicone septa. Glass vials are made from heavy-wall, Type I, Class A borosilicate for its high resistance to chemicals & thermal shock. Microwave reaction vials are designed to withstand pressures up to 300 PSI (20 bars). PTFE-coated stir bars are used to provide continuous stirring & even heating during reactions.Chemglass microwave vials come complete w/ vials, septa & stir bars packed for convenience, cleanliness & protection in white corrugated cartons w/removable trays of ten vials each. For crimper & decapper tools see CG-4930.PLEASE NOTE: Stir bars and aluminum seals are supplied but are not assembled.CG-4920-03 Complete Package Includes:100ea 0.5-2mL Vials, 100ea 20mm Aluminum Seals with PTFE Faced Silicone Septa, and 100ea 5.25mm Width X 11mm Height Triangular Shaped PTFE Stir Vanes