Sigma hplc sample vials manufacturer- Aijiren Crimp Vials Sep 27, 202 · Home » News » HPLC Septa Cap » clear vial septa closure for HPLC vial Sigma Sigma 20ml thread headspace glass vials in borosil for GC/MS 20 mL, 30 mL, 40 mL and 60 mL vials in clear and amber glass of st hydrol. class glass Bonded Silicone/PTFE closures, thread design 24-44, open/closed top, most frequently used in