100/pack chromatography crimp neck vial magnetic cap-Lab Crimp Neck Vial Kits, N 11. 11 mm crimp neck vials and caps commonly used in GC and HPLC and suitable for almost all autos . 100pk ND20 Crimp Neck Headspace Vial Exporter-Aijiren . 100pk ND20 Crimp Neck Headspace Vial Exporter Material: USP Type 1, Class A, 33 Borosilicate Glass Neck Diameter: 20mm Qty/Pack: 100pcs/pack Volume: 6-20ml