Perfect Compatibility – Specifically designed for Fluval 306 and 406 external canister filters, directly replacing part A-20153 for a precise and secure fit. High-Quality Impeller & Shaft – Made of durable, wear-resistant materials to ensure stable rotation, low noise, and efficient water circulation for your aquarium filter. Quick & Easy Installation – User-friendly design allows tool-free replacement, enabling you to restore your filter's performance in minutes without professional assistance. Cost-Effective Repair Solution – Ideal for fixing common filter issues such as weak flow, unusual noise, and malfunction, avoiding the cost of replacing the entire filter unit. Packing includes: 1Pcs Impeller and 1pcs shaft