6 mL Headspace Vial, 23 x 38 mm, 100pk.

Flat bottom headspace vials for those who cannot use the
rounded bottom style.
Vials use standard 20 mm aluminum crimp caps and seals.
Dimensions are: 6 mL, 23 x 38 mm; 10 mL, 23 x 46 mm;
20 mL, 23 x 75 mm; 27 mL, 30 x 60 mm shown above left
to right.