The Varilight white plastic dimmer range has a 15mm depth from front to back of plate and require a 25mm wall box. Covered by the Varilight 10 year guaranty. Each dimmer has different characteristics and load requirements which are listed in the product title. Single plate size: 85mm x 85mm. Double plate size: 85mm x 145mm. Max Load 1000 Watt / Min Load 200 Watt NOT SUITABLE FOR DIMMABLE LEDS V-Plus intelligent dimming technology - Ideal for mains and low voltage halogen lighting Soft start feature and intelligent overload protection Dimensions: 85x85x50mm. Classic White Plastic, Manufacturer: Doyle & Tratt Products Ltd