Features: Made of high-quality materials for durability. The nozzle and electrode are made of red-copper, which is resistant to high-temperature and wear and is durable. The swirl-rings and shield-cups are made of ceramic-material, which is heat-resistant, corrosion-resistant and highly-rigid. The nozzle has smooth incision, narrow-slit, small thermal deformation and easy slag cleaning. The pilot-electrode on the plasma-cutter is to assist arc-ignition. The shield-cup is used to protect the plasma-torch. Easy and flexible operation, easy replacement of old or damaged-parts, ensuring-optimum cutting quality and reliability. Specifications: Material:Red-Copper, Ceramics Electrode: 39mm x 8mmx3.5mm/1.54 "x 0.31" x 0.14 "(length x maximum diameter x minimum diameter) Nozzle: 15.7mm x 11.6mm x 7.5mm/0.62 "x 0.46" x 0.30 "(length x maximum diameter x minimum diameter). Cup guard: 29.7mm x 22.7mm x 17.3mm/1.17 "x 0.89" x 0.68 (length x maximum diameter x minimum diameter). Vortex-ring: 7mm x 5mm/0.28 "x 0.2" (length x height). Suitable for plasma-cutting machines such as CUT-40, LGK-40 and PT-31. Package Includes: 10pcs Electrodes 10pcs Nozzles 5pcs Shield-Cup 5pcs Vortex-Rings note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.