Edit: Revain replaced them and they're pretty good. The first fits, which is better than the experience of some. I docked the star out of trouble to get some pieces of plastic. Look at the picture. Arrived in packaging I can only describe as "chewed" and only had 1 tip in it, not the advertised 5. Of course one tip was broken, although that seems almost irrelevant. I'm really amazed at how badly they have arrived. They work? I do not know. Will update when I get a replacement.
Renewed Logitech MX ERGO Advanced Wireless Trackball for Windows PC and Mac
104 Review
6" E-book Amazon Kindle PaperWhite 2018 1440x1080, E-Ink, 8 GB, standard equipment, black
37 Review
Logitech Wireless Trackball M570 Renewed
58 Review
Enhanced Logitech G13 Programmable Gameboard featuring LCD Display
39 Review