Modular system to connect 10mm sticks I bought on Amazon to create a support for a raised bed cover. 

I used it to create a rack where a net can hang off of. To cover our raised beds in the garden.

Created various corner pieces (different angles). The extention tubes need to be used on the corner pieces aswell. But extention pieces are also for extending the 30cm sticks if needed.

Tip: I split the corner piece in two in my slicer, that was you don't need to use supports, the extention tubes holds the two pieces together anyway

All printed in PETG on 0.3mm, 2 perimitters, 1 bottom-, 2 top layers and 20% infill for fastest print speed

[update] I added SPLIT versions of the corner pieces for your convinience :)

[update] and a SET for complete corner piece & extention pieces all-in-one

Amazon link (no affiliate) 

https://www.amazon.nl/dp/B0993D8N2W?psc=1&ref=ppx_yo2ov_dt_b_product_details