Models: 246428 246-428 17J552 Airless Pump, Replacement of 390 395 490 495 595. Easy to Install: Professional Installation is Highly Recommended, Aftermarket Pump Displacement 246/428, Designed for Airless Spraying Machine. High Quality: High Quality Stainless Steel Material A More Cost Effective Model than the Endurance Pump; Performance Tested on Every Single Pump with Hydraulic oil. Precautions Before Use: Please shake the pump several times before installing the pump to prevent the internal steel ball from sticking with the alloy plate, which may cause the product to fail to work normally. Please Note: many do not carefully check the product description, resulting in wrong purchase, wasting your time and high logistics costs. It is not suitable for Max 395/495/595. Please read the description carefully to make sure this is accurate product you are. Colour:As Shown Material:Stainless steel Package Contents: 1 * No air 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.