These are mains operated switch from the wall only

Ultimately these are a load-bearing fixing plate

and multi-Cell geometry calculation

material powder coated aluminium

porcelain wall speaker socket brick red FLOOR LAMP These are mains operated switchPorcelain speaker REPRO socket. With a glazed surface. With a highly durable surface and colour fastness. CE Certificate of Conformity. Decorative cover. 50 year warranty. Minimum centre spacing of installation concealed boxes 100mm (min. 95mm), depth of boxes 43 mm. Practical KATY PATY box spacers can be used to connect more boxes. Assembled to order, please allow 3 4 weeks for delivery.