Dual Tube Emergency Whistle with lip bump (remix)
thingiverse
This is a remix of the loudest whistle I've found. It's a great whistle. You can print it at 50% size and it still makes sound. It's great for almost any size. I added a lip bump to aid in retention if using for a while (like a police officer directing traffic). Print Settings Printer: Flux 3D Delta Rafts: No Supports: No Resolution: 0.3mm Infill: 20%
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