Wheaton® 223695 Amber Glass Serum Vial with 20mm Crimp Top Finish, 5mL. Wheaton vials are ideal for lyophilization and freeze-drying applications. Capacity: 2mL. O.D. x Height: 22 x 40mm. Crimp Top Finish: 20mm. Tubular design provides excellent clarity and dimensional consistency room vial to vial.