The CB 25 ceiling mount is for the ELAC On-Wall series, specifically for the WS 1425 and WS 1665. The CB 25 ceiling mount is white. The assembly is extremely easy. One ceiling mount is required for each of the WS1425 and 2 ceiling mounts are required for each of the WS1665.
The price is per piece. i.e. please order two if you want a pair.