open center, seal diam. 11 mm, for use with 2 mL-2.5 mL standard opening crimp top vials, pkg of 100 ea Pricing 27222-U removable center, 13 mm, diam. × opening 13 mm × 6.4 mm, for use with 2 mL - 2.5 mL standard opening crimp top vials, pkg of 100 ea