Features: The tube is made from high strength ceramics, and the contacts are made from conductive coppers alloy. The moltens tube is filled with chemically treated high-purity quartzs sand as arcs extinguishing medium. If a limit value is exceeded by current and durations, the Fuses will melt off and interrupts the circuit. Use the Fuses inserts to reliably protect electrical installation, signal and control circuits against load and short circuit currents. It can also be derived as short circuit protections for semiconductor devices and short circuit protections (aM) for motor. Specifications: Material: Metal and plastic Current: 16A/25A/32A/63A/50A Size: Approx. 34.6x10x10mm/13.62x3.94x3.94inch Package Includes: 10PCS Neozed Fuses note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.