HPLC Vials & Caps white PTFE/red Silicone septa, 9mm blue screw-thread pp cap, 250ul Micro-Insert, clear glass, flat bottom, suits for ND8 Vials. 1.5mL 8-425 Screw Neck Vial ND8 for GC and HPLC 1.5mL/2mL screw neck ND8, small opening, 8-425 thread autosampler vials with matched PP screw seals ND8, PTFE/rubber septa & micro-inserts.