Genuine Bose UB-20B Wall/Ceiling Bracket – New & Unused. Bose UB-20B Speaker Mount. (1) Bose UB-20 Bracket. Directly compatible with mostAcoustimass ,Lifestyle ,CineMate, and3-2-1 cube speakers. (Note: These are the original UB-20 series brackets and may require an adapter for certain "Series II" Virtually Invisible speakers).
eBay