This set of spray nozzles includes a total of 21 types, designed for easy installation, durable use, and compatibility with most domestic airless spraying machines. Features: Practical and wear-resistant. User-friendly operation with excellent atomization and efficient cleaning capability. The front digit indicates the spray rate; a larger number produces a wider spray pattern, while the following two digits symbolize flow rate, with a larger number indicating greater flow. Suitable for various airless sprayers, it is perfect for spraying both interior and exterior latex paint and oil paint in small to medium-sized and large residential and commercial buildings. Specifications: Models: 217, 317, 417, 515, 517, 519, 521, 523, 525, 617, 619, 621, 623, 625, 627, 629, 631, 635, 643, 645, 649 (optional) Main color: yellow + silver Main materials: aluminum, iron Item size: 55 * 50 * 18mm / 2.2 * 2.0 * 0.7in Item weight: 20g / 0.7oz Package size: 125 * 85 * 40mm / 4.9 * 3.3 * 1.6in Package weight: 37g Package list: 1 * Airless Spraying Machines Tip About Shipping: All items will be shipped within 3 business days after payment is received. Typically, delivery occurs within 8-12 days, but specific delivery times may vary based on circumstances. If you have any questions during your shopping experience, please feel free to reach out to us, and we will respond within 24 hours. We hope you enjoy your shopping experience, and we appreciate your cooperation as we strive for your complete satisfaction.