Zhejiang Aijiren is the leading hplc autosampler vials manufacturers and suppliers,welcome to wholesale vials from us. 20mm Crimp Top Headspace Vials & Caps - Chromatography Direct. Product Filter · 10ml clear round bottomed Headspace vials 22.5 x 46mm (CTC, Perkin Elmer & Aijiren) · 20ml clear round bottomed Headspace vials 22.5 x 75mm (CTC,