E3D Prusa Nozzles for MK4/XL - 0.4mm are high-quality 3D printing nozzles created especially for compatibility with Prusa's Nextruder. The design features an all-metal filament guide for a completely metallic filament path, which increases the reliability of the printer and facilitates quicker nozzle swaps. The nozzles have an input diameter of 1.75mm, and are capable of withstanding high temperatures up to 300°C, making them suitable for a wide range of printing materials and applications.