Plug Socket spacer | Light Switch Spacer | 1-Gang 2-Gang |10/15/20mm| back box

Socket Switch Spacer – Single or Double Gang. Gang Type: Single or Double. Spacer Depth: 10mm, 15mm, or 20mm. The Socket Switch Spacer is a practical solution for extending the depth of 1-gang or 2-gang electrical back boxes, making it easier to achieve a clean, flush finish—especially when installing over wall panelling like wood slats.

eBay