Size: about 5x20mm. 10 different Ampere values:0.2A,0.5A,1A,2A,5A,8A,10A,15A,20A Quantity: 100pcs They are packaged in a clear plastic box for well keeping the different Ampere values separated and easy to access. Operating principle: When the circuit failure or abnormal, with the rising current, and the increased current in the circuit may damage the device or precious some important components, or even burning of the circuit may also cause a fire. If the circuit fuse correctly placed, the fuse will be in the current exception is raised to a certain height and heat when its fuse cut off the current, and thus play a role in the safe operation of the protection circuit. Package Including 10 * 0.2A 10 * 0.5A 10 * 1A 10 * 2A 10 * 3A 10 * 5A 10 * 8A 10 * 10A 10 * 15A 10 * 20A 1 * Clear Plastic Storage Box Case