Jun 17, 2011 · Each hole of the Vialtweeter is made to hold vials of the most common sizes, brands and designs, such as: vials and test tubes of 0.5ml, 1.0ml, 1.5ml or 2.0ml volume, for example 12x32mm or 15x45mm; vials made by Eppendorf, Sun-SRI, Greenwood or compatible; vials with snap-top, crimp-top or screw-thread finish; vials with/without limited volume