NBS21B has a slimline design (only 31mm deep) with softly rounded corners and black plug inserts for a sleek, modern effect wherever it’s installed. No plastic is visible around the matching brushed stainless-steel switches and the brushed stainless-steel finish is also lightly lacquered to reduce the impression of fingerprints. These electrical sockets can easily be retrofitted into existing backboxes (25mm minimum box depth required) and are supplied with colour coded fixing screws. Furthermore, the NBS21B is fitted with a moisture-control gasket which enables it to be installed into recently plastered walls without the risk of tarnishing the finish. • Top quality Brushed Steel finish - lightly lacquered to prevent finger marks. • Matching Brushed Steel rocker switch • Black plastic insert • Specification: 13-amp, double pole (BS 1363 part 2) • Requires a 25mm metal wall box. • Supplied with colour coded fixing screws.