Donation page.
Flexivent is our hobby. We will never ask for money for our products. If you would like to reward our work voluntarily, we are still happy: D

Just donate as much to us as it is worth to you. It is up to you what you enter into PayPal. Below are some suggestions if you don't want to type something in: D

Thanks for your help! :)

But be careful : If you are under 18 years of age, you have to discuss this with your parents , and not just do it! :)