The Wheaton Vacule® glass ampule is designed for freeze drying, protein hydrolysis and micro-determination of ketones and amino acids. The long stem provides a convenient means for heat sealing under vacuum. The pre-scored feature allows for easy opening. Made of Wheaton 33 low extractable borosilicate glass that conforms to USP Type I and ASTM Type I, Class A requirements. Capacity: 2mL. Diameter: 11.8mm. Height: 122mm. Material: Borosilicate Glass. Color: Clear. Wheaton #: 651506.