WB45 wall boxes allow surface mount installation for any standard size 45 x 45mm product such as matrix control panels, volume controllers, breakout boards etc. double unit size (WB45D). They are available in black (/B) and white (/W) The WB45S/FS is an embedding box for stone or concrete walls, The WB45S/FG is an embedding box for hollow walls.PZA More features