Heavy-Duty Spray Pump：CNC-machined for 50% greater strength compared to standard pumps. Compatible with Graco Ultra Max II 695/795 & LineLazer 3900. This complete pump set includes all internal components with stainless steel rod & packings, offering a more cost-effective solution. Note 1: Non-PC pump, incompatible with sprayers produced after 2019. Note 2: Shake pump before installation to prevent ball sticking and malfunction. Note 3：Professional knowledge required for installation. Not recommended for inexperienced users. Compatible and incompatible machine models Compatible with Graco GMAX II 695 /795 Ultra Max II GMAX 3900 LineLazer 3900 Sprayers. Please note:Do Not Compatible With Graco PC and Por 695/795/3900 Sprayers.If your sprayers are of these models, I have sales of pumps suitable for these models. Please click on my store to buy them.