Number of Knockouts. BS 4662:2006+A1:2009. Product Range. Number of Gangs.
MK Single Gang Metal Surface Box 1 Gang 40mm Surface 20mm Knockouts
Schneider Lisse 1 Gang 40mm Pattress Back Box White **Free P&P*
MK K8892ALM Grid Plus 2 Gang Surface Metal Back Box with Knockouts
Heavy Duty Metal Clad 10AX 1 Gang 2 Way Plate Switch with Back Box
YBS.B Varilight 1 Gang (Single), Patress Wall Box (for surface mounting) Brass
YBS.C Varilight 1 Gang (Single), Patress Wall Box (for surface mounting) Chrome
