8mm screw vial Product Description. 8-425 Autosampler Vial is made of Borosilicate glass by Aijiren. Borosilicate glass is low extractable material. So Screw Thread Top Sample Vials can be autoclaved. Especially, Screw Thread Top HPLC Vials are always used to critical research studies. Aijiren offers autosampler vials and consumables for