Dosing Tube Holder for 1/4" aquariums and sumps
thingiverse
This tubing holder was made for 1/4" wall aquariums and sumps. It will flex to accommodate slightly greater wall thicknesses. I'm using it with 1/4" RO tubing and with 0.27" holes the tubing fits nicely with a little bit of friction. 0.26 might be a little more secure. This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/68PXAsiVf5M
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