HY1500VB Vertical Mount Bracket for HS150B/1500BTThe HY 1500VB Mount Bracket is designed to mount speaker system to a wall or ceiling in a vertical configuration. It allows the speaker orientation angle to be adjusted from 15 upward to 60 downward when mounted on a wall, and from 15 upward to 90 downward when mounted to a ceiling. Product Features Made for HS 150B HS 1500BT Vertical orientation Product Specifications Finish: Steel plate, paint, black Dimensions: 460. 4 x 403. 2 x 90 mm (W x H x D)