British Standard Wire Gauge is a set of wire sizes given by BS 3737:1964 (now withdrawn), and is generally abbreviated to SWG. It is also known as: Imperial Wire Gauge or British Standard Gauge. Use of SWG sizes has fallen greatly in popularity, but is still used as a measure of thickness in guitar strings and some electrical wire. Cross sectional area in square millimeters is now the more usual size measurement for wires used in electrical installation cables. The current British Standard for metallic materials such as wire and sheet is BS 6722:1986, which is a solely metric standardWire GaugeFEATURESMATERIAL: STAINLESS STEEL AND COME WITH POUCH PACKAGEDUAL MARK SWG SAE.SWG: 0-36 STANDARD, INCH SCALE: 0.3125? ? 0.007?,THE WIRE GAUGE IS ACCURATE FOR WIRE AND METALPACKAGE INCLUDE: 1PCS WIRE GAGE WITH PU LEATHER PACKAGE SPECIFICATIONMaterial: Stainless SteelDual mark SWG and SAE.SWG: 0-36 standard, inch scale: 0.3125? ? 0.007?.Gauging non-ferrous wire and metal such as copper, brass, also gauging uncoated sheet, plate iron and steel.