Standard opening 2ml vial inserts China-HPLC Vial Inserts China 1.5mL 8-425 Screw Neck Vial ND8 Micro-Inserts 1.5ml/2ml Screw Neck ND8, small opening, 8-425 thread autosampler vial with matched PP Screw Seals ND8, PTFE/rubber septa & Micro-Insert Product Description 1.8-425 Standard autosampler vials(11.6*32mm) for GC and HPLC 2.Available with black or white Integrated 150ul micro insert vial