Designed to organize my glass-panel shower enclosure. Assembled using the 5/8" square towel bar replacement parts from hardware stores (4 for the shampoo shelf, 1 for the towel bar). 18" used for the pictures shown. Hooks can be placed on either, since the bars are the same. I suggest putting shampoo shelf hooks on the front or back instead of the bottom rails so they don't interfere with the bottles. Use stainless #4 by 3/8" screw and nut for the scrunchy holder. All parts designed to be printed without supports in the orientations of the stl files.