2 Gang 25mm Metal Back Box Galvanised Steel Flush Mount Box BS 4662 Evoges EMB2G25

This is the Evoges EMB2G25, a 2 Gang 25mm Metal Back Box Galvanised Steel Flush Mount Box BS 4662 available at Sparks for the best price.

The 2 Gang 25mm Metal Back Box is a slim, robust mounting enclosure designed for flush installation of a variety of electrical accessories — such as double sockets, light switches, USB sockets, dimmers and smart modules — in walls with limited cavity depth. With an internal depth of just 25mm, it’s especially useful where there’s minimal space to accommodate deeper back boxes, such as in plasterboard partitions or behind architraves. The compact design helps ensure accessories sit flush to the wall surface for a neat, professional finish. 

Crafted from pre-galvanised steel, this back box offers mechanical strength and resistance to corrosion, making it suitable for everyday residential or light commercial electrical installations. It includes pre-formed knockouts for easy cable entry and typically features both fixed and adjustable mounting lugs to aid alignment and secure fixing of the accessory. Designed to meet UK electrical standards, this metal box supports compliant and reliable wiring work. 

Whether you’re installing new wiring or upgrading existing fittings, this flush metal back box provides a dependable and affordable foundation — giving installers the flexibility and strength needed for quality electrical work. 

Technical Specifications

• Type: 2 Gang Metal Back Box – flush mount recessed enclosure 
• Material: Pre-galvanised steel for strength and corrosion resistance 
• Number of Gangs: 2 (for double electrical accessories) 
• Depth: 25mm – shallow profile ideal for limited wall cavity space 
• Dimensions: Approx. 70mm (height) × approx. 130mm (width) × 25mm (depth) 
• Knockouts: Multiple 20mm pre-formed knockout holes for flexible cable entry 
• Mounting Lugs: Typically includes one fixed and one adjustable lug for secure fixing 
• Earth Terminal: Provision for earth bonding/terminal (varies by supplier but common) 
• Standards: Compliant with BS 4662 (British standard for electrical installation boxes) 
• Finish/Colour: Silver/Galvanised steel 
• Installation: Designed for flush wall mounting for switches, sockets, etc. 

Three Reasons Customers Love It

• Ideal for Shallow Cavities: The 25mm depth lets you install standard 2-gang accessories even when wall cavities are narrow — perfect for plasterboard and partition walls. 
• Strong & Compliant: Made from galvanised steel and built to BS 4662 standards, it provides reliable mechanical support for switches, sockets and modules, giving electricians peace of mind. 
• Easy to Work With: Featuring pre-formed knockouts and mounting lugs, it’s flexible and quick to fit — making both new installs and retrofits smoother and more efficient. 

Note: Some images and pictures are for reference only. The item may differ from the image/picture due to manufacturer's change. Should you require the exact item in the picture, please call or email us to enquire.