Precise Compatibility for Target Sprayers This O-ring is perfectly fit for Graco Ultra series electric airless sprayers, including Ultra 395, 495, 390 and 490 models. It is designed for the pump suction valve and feed port sealing, serving as a direct replacement to restore sprayer performance. Note: Not compatible with Graco non-spray equipment (strollers, car seats) or other brand sprayers. Industrial-Grade Fluororubber for Durability Made of high-quality FKM fluororubber, it features excellent high-temperature resistance with a working range of -20℃~200℃ and short-term tolerance of 230℃. It boasts a compression set of less than 20% (200℃/70h) and superior elasticity, avoiding cracking or hardening under frequent friction and high-temperature conditions. Reliable High-Pressure Sealing Performance With precise annular structure and tight fit design, it effectively seals the sprayer pump body to prevent coating leakage. It maintains stable pressure during high-pressure operation, reduces equipment vibration and noise, and ensures continuous and smooth spraying work without interruptions from seal failure. Tool-Free Installation & Long Service Life No professional tools or skills required—directly install it into the pump body seal groove without polishing or adjustment. The fluororubber material offers outstanding wear resistance and weather resistance, resisting humid environments and UV impact, with a service life far exceeding ordinary rubber O-rings. Wide Adaptability for Spraying Scenarios Suitable for both water-based and oil-based coatings, it adapts to home decoration, small-scale engineering and daily maintenance spraying needs. It meets industrial safety standards with no harmful substances released, ensuring safe use in various working environments and reducing the cost of frequent replacements.