2 mL screw top vials in clear with screw caps for wholesales for hplc sampling 2 Ml HPLC Vial Supplier & Trader in Bangalore,Karnataka,India We offer a full range of 2ml,4ml,10ml,up to 20ml vials and above,including VOA and EPA vials at 40mls. These are. 8mm Screw PP Caps from Aijiren--Aijiren Vials for HPLC/GC.