Venturi
thingiverse
This is a remix from https://www.thingiverse.com/thing:398515 Sized for 1/2 inch ID vinyl water tubing and 4mm ID silicone tubing for an airline. Works great with my algae scrubber!
Download Model from thingiverse
With this file you will be able to print Venturi with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Venturi.