This adapter allows easy integration of side speakers with any Chief THINSTALL™ Large and Medium swing arm (TS525, TS325 and TS318 products). - Low-profile, adds only 0.13" (3.3 mm) depth to installation - Infinite adjustment to fit most speaker and screen combinations - Can be used with TA350 Center Channel Speaker adapter - Interface can fit speaker mounting patterns up to 16" (406 mm) tall. - Compatible with Chief's TS525, TS325, TS318T and TS318S swing arms series of products.