Oct 14, 2021 · These inserts are the best choice when using low volumes of biological or basic compounds that might interact or adsorb to borosilicate glass. 250ul micro insert is a common using type for 9mm autosampler vials. Aijiren provides micro-insert with complete specifications, including glass inserts, plastic inserts, 150ul/200ul/250ul/300ul. 2ml sample vial is matched, suitable for 8-425 HPLC Vials, 9-425 HPLC Vials, 10-425 Vials, 11mm Snap/Crimp Ring Vials.