20ml amber precision screw- thread vial, round bottom 22.5*75.5mm Company Profile Quzhou Lab Technology Co.,Ltd mainly produces various types of chromatography Sample Vials , Syringe Filters , Petri Dish ,Cuvette,frozen pipes, deep well plates , Centrifugal Tube ,chromatography membrane filter, medical pharmacy bottle, butyl rubber stopper, various types of thermometers used for laboratory .