Aijiren focus on autosampler vials with caps,hplc vials,headspace vials since 2001,main lab 0.3ml 9mm glass screw vial integrated with micro insert. hplc-vial-inserts Volume: 150ul, 250ul, 300ul Dimension: 5x29mm, 6x31mm Material: Clear Glass Suit Aijiren 250ul Vial Insert, Glass Spring Bottom for 9, 10, 11mm Vials.