A case for Fastrak Flex v5 (used from 2016-2023 I think) so you can print it in a color that matches your car's interior.

Notice the back of the case is designed so you slide the Fastrak into it one side first, (the right if viewed from the front), then the other side should friction fit into place.

Note this ONLY fits one style of Fastrak Flex, the circled one in the table below.

If you need a case for the v5, here is a link.