Models: 246428 246-428 17J552 Airless Spray Pump, Replacement for 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: Made of high-quality stainless steel, a more cost-effective model compared to the Endurance pump. Each pump is performance tested with hydraulic oil. Precautions Before Use: Please shake the pump several times before installation to prevent the internal steel ball from sticking to the alloy plate, which may cause the product to malfunction. Please Note: Many buyers do not carefully check the model, resulting in incorrect purchases and unnecessary shipping costs. This item is not suitable for ST Max 395/495/595. Please read the description carefully to ensure this is the correct product for your needs. Color: As shown Material: Stainless steel Package Contents: 1 x Airless spray pump Only the above package content is included; other items are not part of this sale. Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.