Blow Glass Tube Fuse Assortment Kit Dimension size: 5x20 mm. Voltage Rating: 250 V Amp Rating: 15 A Light electronic Condition: New Quantity : 1bag per 10 PC Color: transparent. Material: Glass Tube Fuse Use: 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,then 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.