Product Details Manufacturer: Nichifu Co., Ltd. Part Number: N 5.5-4 Type: Heat-resistant terminal (R type/Round type) Material: Nickel Application: Primarily used for connecting heater wires and heating wires. Heat Resistance: Capable of withstanding temperatures up to 400°C. Quantity: 100 pieces per pack Specifications Item | Details Wire Size Range, Nichrome/Nickel Solid Wire: 1.9～2.8mm Stud Diameter (Screw Diameter): 4.3mm Overall Length: 19.5mm This product is a heat-resistant type specifically for nickel and nichrome wires. However, using standard crimping tools for copper wire terminals may reduce durability, so the use of appropriate tools is recommended.