The SQS-CENTER is a heavy-duty caster plate that goes in the middle to reinforce your base and your structure by adding a pipe and a caster.
The SQS-CENTER is designed so you are able to put different wheels size on it 4, 5, or even 6 inches and those items:
For your structure, you still are in need to use normal pipes. You can use either the normal steel pipe and, or the PE coated black pipe (ESD).
A Flexpipe Product
For technical details and images, please search for the product using the 80/20 interactive catalogue found here: https://catalogs.8020.net/80-20-Catalog-26/C/.