The microvials consist of a standard 12 x 32 mm vial and an insert inside the vial that is fused at the head and bottom.
Volumes of insert/vial combinations range from 150 µl to 1.5 ml. Available in clear glass, amber, and polypropylene, with seal mouth, screw cap and Snap -it and closures of 9mm, 11mm and 8-425, 10-425 and 13-425.