This product is only suitable for 246-428 airless pump 390 Ultra 395 490 495 595 sprayer, not suitable for Nano ( er version) : Made of aluminum alloy material, wear- and , long service life. A pump is a device that sprays or atomizes liquids. It uses pressure to send liquid into the nozzle, causing the liquid to out in the form of small droplets. The principle of the pump is to use an electric motor or engine to drive the pump body to rotate, causing the liquid in the pump body to increase pressure and flow out, thereby achieving the effect of spraying or atomizing the liquid. Airless is widely used: pumps are used in agricultural production, and their main functions are water supply and irrigation; they can also be used in the industrial field to clean cars, buildings, machinery and equipment, etc.; in the construction field, they are mainly used for paint spraying and wall coatings, bathroom cleaning, air freshening, etc. When using pumps, we need to pay attention to their installation, maintenance and use to their long-term effective performance. Colour:As Shown Material:Metal Package Contents: 1set * 246428 Airless Pump Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.