I designed these pieces a few years back for a sand coffee table, as seen in the pictures. They are printed in PLA and are plenty strong, but I will reprint them in PETG. The table consists of 5 plates, they have a minimum thickness of 8 mm, but I'm using plates of 12 mm in the pictures. You also need 8xM8 countersunk bolts and 8xM8 nuts. The bolts I'm using are M8x32.

The pieces can be used for all different kinds of furniture. Please message me if you want the original Autodesk files.

For more info on the sand table: https://docs.v1e.com/zenxy/