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. Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 10pcs Electrodes 10pcs Nozzles 5pcs Shield-Cup 5pcs Vortex-Rings