Features: Replacement nozzle ceramic tips. Surface sandblasting,marble engraving. Instead of cast iron,alloy steel nozzle,saving steel,reduce the cost. Strong wear resistance and high efficiency. Mainly used in machinery,industrial machinery parts,such as metallurgical casting,casting surface deoxidization. Specifications: Material:Plastic Specification:4.5mm/5mm/6mm/7mm Package Includes: 10 Piece Nozzle Tips note: Please allow 1-2cm errors due to manual measurement,pls 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.