This is the complete assembly with the strap and upper button for the No-Bs and Ergo throttles. This button will only be compatible with No-Bs Throttles produced after 2022 (please reach out if you have an earlier version).
Please note, heat will likely be required for disassembly and friction fit assembly. Carefully use a heat gun or hair dryer to warm up plastic first, then twist the button back and forth while pulling to remove.