Glass Vial Micro-Insert, For R & D Pharma, Packaging Type . Vial Inserts Micro-Insert 0.3mL Aer Screw Vial Integrated w/Micro-Insert, w/Write-on Spot,Base Bonded, 11.6*32mm 1)9mm screw vials can be used on all common autosampler. 2)Standard narrow neck design for GC and HPLC. 3)9mm wider opening for easy puncture. 4)Clear, type 1 class A borosilie glass