Product Type: UB-20 series II Ceiling Speaker Mounting Brackets for Bose all Lifestyle CineMate and for Bose Surround Speakers 809281-1100. Compatible Models: Suitable for Acoustimass 10, Acoustimass 15, Acoustimass 6, Acoustimass 16 series, a leisurely Lifestyle 535 525 520 T20 235 series, 321 series of satellites and Surround Speakers 809281-1100. HIGH-QUALITY : Constructed with solid steel,Exquisite workmanship,Crude scrub and glaze light surface,touch smooth. it presents an elegant look especially when installed at home. Multiple Adjustment: This UB-20 II bracket speaker mounts allows for horizontal & vertical adjustment of speaker, for optimum listening angle and sound direction. Package Includes: 1pcs Bracket Components & 9pcs Small Gadgets,with Manual.