triple-layered shipping box

6U (2x 3U), 9U (3x 3U), 10U VCS3 style, 12U (4x 3U), 14U (4x 3U, 2x 1U), 15U (5x 3U), 18U (6x 3U), 19U (6x 3U, 1x 1U), 21U (7x 3U), 22U (7x 3U, 1x 1U)