Hello recently I got some plastic shelves but my bins won't fit, I want to know if you guys can give me a specific brand of shelves I can use, my bins are 18 inches tall so what I need is spacing between shelves to be between 18 and 20 inches, I got 4 bins being used an 1 empty so a 4 tier shelf unit would do but a 5 would be alright too, It's been years that I have my bins side to side in different places but I need the space to put new furniture the stacking would solve the problems I know some people buy wood and build their own shelves but I don't have the tools or knowledge to build something like that I want something that can be bought with easy assembly I'd prefer plastic over steel but I'm open to all suggestions as long as It's not building the shelves from scratch I'll leave the links of the bins if you guys want to know the exact measurements
https://www.amazon.com/Sterilite-19481004-Titanium-Latches-45-Gallon/dp/B002C4KYFS/
and
https://www.amazon.com/Sterilite-Gal-Stacker-Tote-Stadium/dp/B077ZFDC6X/
Mine do not have wheels btw