Product Description V945 1.5mL Aer Screw Neck Vial w/Write-on Spot, 9-425 Thread, 11.6*32mm, USP type 1 Features 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 5)9mm PTFE/silicone