Sentry BT999 Bluetooth Earbud Hook

The stock ear hooks on the Sentry BT999 pro Bluetooth earbuds were too floppy for me. This is a direct replacement that can be printed in TPU. To install:
1. Remove the single screw on the back of each earbud.
2. Carefully pry open the case.
4. The stock ear hook can be easily removed.
5. Install newly printed ear hook and close the case.

Enjoy!