10-20mL 18mm Screw Thread Headspace ND18. HPLC Syringe Filters. Micro-Inserts. 1.5mL 11mm Snap Ring Autosampler Vial ND11. 4mL 13-425 Screw Neck Autosampler Vial ND13. 16mm Test Tubes for Water Analysis. 20-60mL 24-400 Screw Neck Storage Vial ND24. 8-12mL 15-425 Screw Neck Vial ND15.