Several of these can also fit a S2U. See descriptions for which ones or Call for Volume Discount
Choosing a 1U Server Shipping Box
The 1U selection includes dedicated 1U boxes and configurable 1U/2U designs. Check the foam setup carefully because adding or removing a foam block can change which chassis height the box supports.
Confirm chassis depth and shipping weight in addition to the 1U height, and verify separately whether rails must fit in the same carton.