25mm pipe connectors

I was thinking about filament shelf to my 3D printing “office” and came up with an idea about modular shelf. We are using 25mm aluminium pipes at my workplace, so I figured to use them. So I draw some connectors to keep pipes together. Holes are 3.2mm for M3 bolts to keep connectors in place. I haven't tried to print and install it yet, but tomorrow I will put it to the test. I will update the situation on how the parts last.

There are probably 13 of these in a dozen, but here is one more model.

Excited to post my first model to public, although I have had printers since 2008. Let's get this thing rolling!