Hinge

Hinge.stl - standard version of a plastic hinge to be used with the PVC version of passive hydroponics grow tower for printing with a 0.2 to 0.3 mm layer height.

Hinge.stl_loose.stl - a loose version with a bigger gap between the master and slave hinge for faster printing with a 0.6mm layer height.

Refer to this blog for more info.
http://billydiy.blogspot.com/2020/11/by-step-pvc-pipe-passive-vertical.html