<https://its.co.uk/pd/SGRID360280-Selectric-20A-Double-Pole-Switch-Module-Engraved-Dish-Washer---White-_SELSGRID360280.htm#Product>
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"20A 1 Gang Double Pole Switch engraved &#39;dish washer&#39;, standard grid switch module suitable for 25mm deep boxes. Compliant with BSEN60669-1. CE Marked. X-rated (where applicable) for fluorescent or inductive loads.  Grid 360 products offer the most versatile option for wiring accessories. Easy to install with no need for yokes, as the modules screw directly into each plate.  The Selectric grid module system of interchangeable switch, dimmer and fused connection unit modules offers exceptional style and features, focusing mainly on versatility for a wide range of domestic, industrial and commercial environments.  Manufactured under ISO to the latest British and European standards and backed with a 15 year guarantee, the grid module system range offers style, durability and quality."
<https://its.co.uk/pd/SGRID360280-Selectric-20A-Double-Pole-Switch-Module-Engraved-Dish-Washer---White-_SELSGRID360280.htm>