The 21-10150 is a 0.2mm Conical Soldering Tip made of copper and alloy iron coated iron tips perform excellent on temperature between 360 and 380°C.
The 21-10156 is a 45° Chisel Soldering Iron Tip used with 21-10115, 21-10120 and 21-10130 soldering stations. Tip / Nozzle Width: 4mm Tip / Nozzle Style: 45° Chisel For Use With: Tenma 21-10115, 21-10120, & 21-10130 Soldering Stations