OD x H22.5 x 75.5mm. Vials are manufactured from clear Type 1 borosilie glass, and require special metal caps with 18 mm thread (sold separately, # 806001). All vials are tested and guaranteed to meet or exceed critical performance parameters. Ideal for use with Aijiren, Shimadzu, Beckman, Gerstel, as well as other 22.5x75.5mm vial