thread integrity chromatography vials white graduation line-HPLC Test Vials 9mm thread screw neck vial, pp, 1.5ml. 9mm thread screw neck vial, 32×11.6mm, transparent / amber PP, with graduation line, slightly concave shaped bottom. Preassembled cap and septafor 9mm thread screw PP cap, blue, centrel hole, PTFE/Silicone 9x1mm.