Comprehensive Replacement Set: Upgrade your chainsaws performance with our complete maintenance package designed specifically compatible with Echo models CS-400, CS400, and CS-450. This set includes a primer bulb (OEM code: 530047721), a fuel filter (OEM code: HUS268610-717), a two-stroke spark plug (L7T/BPMR7A), an air filter compatible with Echo CS-400, and an adjustment screw to ensure your equipment operates efficiently and reliably.Superior Quality Parts: Each component in this set is crafted from materials to meet or exceed OEM specifications. The 188-512-1 primer bulb guarantees an optimal fuel flow compatible with your Echo chainsaw while the air filter ensures cleaner air intake, maximizing engine efficiency and longevity. Trust our parts to keep your tool performing at its best, so you can tackle any job with confidence.Installation: Designed compatible with user-friendly installation, this replacement kit allows you to quickly and easily swap out worn or damaged parts compatible with your Echo CS-400, CS400, and CS-450 chainsaws. No professional tools are required, making maintenance accessible for beginners and experts alike. Get back to work without the hassle of complicated repairs, and enjoy your chainsaws enhanced performance in no time.Enhanced Engine Performance: The included two-stroke spark plug (L7T/BPMR7A) and OEM parts significantly improve your chainsaws overall performance. Replacing old or faulty components ensures a spark for smoother ignition and better fuel combustion. This results in a more powerful engine with reduced emissions, ultimately extending the life of your Echo equipment.Reliable Performance and Durability: Our replacement parts are built to withstand the rigors of regular use. Whether you are a professional contractor or a weekend warrior, ensure consistent operation and reliability with parts designed to fit in your Echo CS-400, CS400, or CS-450. Invest in parts that guarantee a higher performance standard, allowing you to tackle even the toughest tasks with ease.