The Peerless Adaptor acts as an interface between the projectors, Epson BrightLink 536Wi, 3M SPC716, and Promethean PRM -20, or SMARTBoard UF55/65 projectors mount arms. It easily fits in with a wide variety of projectors that include 420/425W/430/435W/520/520W/530/535W and BrightLink 536Wi. The superior quality materials utilized ensure its long life and excellent performance throughout the life span. It is compatible with projector mount arms that include PRM-20 or SmartBoard UF55/65 projector mount arms.