1 Gang spacer frame smooth edge, bright white finish. Gives you the extra space, 10mm, required when installing a single socket with USB onto a 25mm deep mounting box. Tried and tested by Team3Phase. Ideal for domestic and commercial use. Complemented by a full selection of grid and modular options. Installation of this product should only be carried out by a qualified Electrician or competent person to the latest building and current IEE Wiring Regulations (BS 7671). For project pricing please call Team3Phase.