Description Description Amber EPA Vial, 20mL, Screw Thread, 28 x 56mm, 144pk Glass: Type I Borosilicate Capacity: 20mL Vial Size: 28 x 56mm Neck Finish: 24-400 Thread 144 pack Color: Amber Manufactured in the USA by an ISO 9001:2015 Certified facility. Caps for this vial are 32024-CAP