pixabay and wikimedia.
It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
Laboratory. pl strzykawka Lubi epodrczniki JP kropekkpl INeverCry Uploaded with Uploaded via Campaign epodrecznikiother Images from Laboratory equipment
Page 2017 Free-images.com. All images are Public Domain