Standard dimensions of 12x32 mm, yet 100 ul capacity for small sample sizes. 0.1 mL volume, 12x32 mm TPX (polymethylpentene) screw-top vial. 8-425 threads, standard mouth. TPX has properties similar to polypropylene, but with transparency close to that to glass. Packaged: 6 in. x 6 in. plastic bag; Weight: 164.4 g.