This product is a PC paint pump,it is suitable for replacement of sprayers produced after 2015.Compatible with for 210es 210pc 230pc 390pc 395pc 490pc 495pc 595pc pro airless paint sprayers. Replace: 17C721 17C-721. 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. It comes with all the seals to successfully rebuild your sprayer.All the leathers and machined parts are made of the highest quality materials. Advantages: Cylinder never wears out, easy replacement of parts,high-quality alloy material, wear-resistant, increased flow pump body, large flow. 17C487 Airless PC Pump for Ultra Max II 210 ES 210PC 230PC 390PC 395PC 490PC 495PC 595PC Pro Airless Paint Sprayer Aftermarket ,Replaces 17C721 Colour:As Shown Material:alloy steel Package Contents: 1set * Airless Spraying 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.