KnightsBridge Flat Plate Telephone master socket gunmetal

Amazon

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. Made from high quality ultra slim, premium grade material Complete with integral gasket for moisture protection 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. Made from high quality ultra slim, premium grade material Complete with integral gasket for moisture protection, Manufacturer: ML Accessories

Electrical World

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