Five layers [free installation + 4 universal wheels + 10 buckles], Six layers [free installation + 4 universal wheels + 12 buckles], Four layers [free installation + 4 universal wheels + 8 buckles], Three layers [free installation + 4 universal wheels + 6 buckles], Second floor [free installation + 4 universal wheels + 4 buckles], One layer [free installation + 0 universal wheels + 2 buckles]
