About This

• Compatible Replacement Part — Designed for Sunsun HW-303B and HW-403B canister filters as a direct replacement waterproof glass sleeve for reliable fit and function.
• High Transparency Quartz Tube — Made of durable glass material ensuring clear light transmission and stable performance inside the aquarium filter chamber.
• Waterproof Protection Design — Prevents internal moisture from reaching the light source helping maintain efficient filtration and system safety.
• Easy to Replace and Install — Simple structure allows quick replacement without extra tools saving time for aquarium maintenance.
• Essential Filter Maintenance Component — Ideal spare part for restoring filter efficiency suitable for both freshwater and saltwater aquariums.