47www. Aijiren. com/chem/supplies GeneralChromatography 8-425 Screw Top Vials, Caps, Septa and Inserts The original, smaller opening vials with an 8-425 thread size screw cap are available with black caps and a variety of septa to meet the needs of your application. • 8-425 thread design • Original, narrow neck size 8-425 Screw Top Vials