This is a nozzle for your Festool dust extractor. It has a larger opening than the factory one so it's less likely to clog. I've printed them out of PLA and PETG. I've noticed that if you're just using it in your garage where it doesn't get really hot, PLA is probably fine. But if you live in the south and store it in your truck, you'll probably want to use a more heat resistant filament because the PLA has a tendency to warp some over time.