Available in 3 configurations to accommodate practically all of your needs. Each cube measures 2-5/8"H x 2-7/8"W x 2-7/8"D. The 9-place version holds 8-mm to 16-mm/10-mL to 15-mL tubes. The 4-place version holds 26-mm to 30-mm/50-mL tubes. The single place version holds 66-mm cups, alcohol dispensers, small flasks, and more.