DWK Life Sciences (Wheaton) Septa for Unlined Aluminum Seals. DWK Life Sciences (Wheaton) Shell Vials, 12 x 32mm. DWK Life Sciences (Wheaton) Shell Vials, 15 x 45mm. DWK Life Sciences (Wheaton) Shell Vials, 8 x 40mm. DWK Life Sciences (Wheaton) Snap / Crimp Top Glass / Plastic Vials with 0.1mL Insert, 12 x 32mm.