The SF/HF H2D Hotend nozzle is designed to be replaceable, which reduces operating costs. Customers can continue to use the quick-release hot end without interrupting printing operations, but the nozzle can also be replaced after removal, which reduces costs. The nozzle is made of hardened steel, which is very durable and more suitable for printing carbon fibre materials. The HF hot end cannot replace the nozzle due to its high-flow design, so if the nozzle is damaged, the hot end needs to be replaced directly.