The 20 mL scintillation vials have a diameter of 27 mm and a height of 57 mm. This size facilitates easy handling and adequate volume for most laboratory applications. In addition, the 20 mL scintillation vials are available with a 22-400 finish or a 24-400 finish. Thus, providing a minimum neck opening of 14.98 mm or 16.76 mm respectively.