Katy Paty double socket back box, hollow wall

European round back box for installation of two switches or sockets into hollow walls. These boxes are required for Katy Paty's "chamfered" double socket plates for example.

Please note: this box is not compatible with THPG's round plate ranges that can be connected into a "figure-of-eight" style combination. For those configurations please use this product: Spelsberg double switch back box, hollow wall