Nicear 2 Pack Aquarium Check Valves Fish Tank Air Pump Valves Plastic 2 Way Non Return Pump Protectors For Fish Tank

• Great one-way check valves for most common aquarium air pumps. DO NOT use them in CO2 or other high-pressure systems to avoid cracking or leakage.
• 5 x 3.6 cm(L x W); Weight: 7 g; Airline Tubing: 4-6 mm standard ID tubing. The air pump valves add no weight to the hose, allowing for smooth airflow.
• The fish tank valves can effectively avoid water backflow during a power outage or pause of the pump. Ideally protect your pump and reduce your loss when you’re at work or on vacation.
• Made of sturdy plastic, the non-return valves can be tightly connected to the hose without air leakage or obstruction. Dependable for long-time use.
• Easy to detach it for cleaning and maintenance without using tools. Please stick something into the hole to poke it open when it gets clogged and restricts air flow.

Features: The fish tank valves can effectively avoid water backflow during a power outage or pause of the pump. Ideally protect your pump and reduce your loss when you’re at work or on vacation. Specifications: Main Color: red Main Material: plastic Package Includes: 2 x Aquarium Check Valve Notes: - Due to manual measurement, there may be some errors in size and weight. - Due to the difference between different monitors, there may be slight color differences.