Standard Opening 2ml hplc 9-425 glass vial with inserts for 2. 9-425 screw top vials is 40% larger opening than standard narrow opening vials, 2ml HPLC Vials with Unique Thread Design Ensures Consistent Seal and Can Be Reused, Not Volatile, Easy to Use 3. 2ml Amber autosampler vial,2mm Diameter, 32mm Height, 9-425 9mm screw top, and included