25mm Fuses are used in standard 3 pin electricity plugs, satellite receivers normally require a 3amp fuse, TV's generally need a 5amp Fuse and a High drain device like a Kettle may need a 13amp fuse. The fuses are all 25mm in length and are sold in bags of 5 or 20 or 50 or 100. All of our fuses conform to BS1362.