Sep 27, 2021 · Aijiren’s 2ml clear screw hplc vials for autosampler is usually divided into three types of calibers. 2ml clear screw hplc vials for sale. 2 mL Standard Opening Vials from Aijiren. Our standard 2 mL vial is 12 mm in diameter, 32 mm in height, and has a 4.6 mm opening. 2ml hplc vials for autosampler on sale.