9064-77 - Accessories and spare parts Wall box for hollow walls, 1-gang halogen-free, colour: white cutting hole ? 68 mm fire resistant up to 850 °C standardised combination distance 71 mm for panel thickness 7 – 40 mm device screw distance 60 mm knockout plugs for for wires and tubes ? 20 mm with 2 installation screws - Quad Industry GmbH