This accessory consists of a C-ring and two tile rails, tobe used for reinforce the ceiling material and tospread out the pressure from the ceiling speakerclamps. The C-ring can be guided through the cut-outopening in the ceiling and placed on the back side ofthe hole before inserting the loudspeaker. The tile railsare suitable for 600 mm distance ceiling tile supportrails. This accessory consists of a set of two pieces.