Modular system, print as many ribs to complete your rack. Your 8mm or 5/16" rod or dowel completes the build. There are two print profiles; the cutting board ribs are heavier and will resist the weight, I recommend 6 or 7 ribs / 300mm long rack. The dish and lid profile ribs are tapered in the centre and add the look of lightness as well as cradle the dish.