Knightsbridge Flat Plate Telephone master socket - gunmetal

The master socket contain a surge arrestor and an R/C circuit filter these are used by your service provider to get a fixed value resistance when they run line checks. Standard BT type socket with screw type terminals. Flat Plate low profile design - Master BT type socket - Screw terminals - Ultralow profile design with built in gasket - Certified to BS 5733 - Minimum mounting box depth: 25mmSpecification: Projection (mm): 2.5Min. Mounting Box Depth (mm): 25mmConstruction: Premium grade steelFinish: GunmetalIP Rating: IP20Earth Terminal: YesTerminal: Screw