Item Type:Check Valves
1. Suitable for the air pipes whose diameter is under 4mm.
2. The one way valves can protect you air pump by preventing aquarium siphon during a power outage and water box back damage.
3. After the check valves being added, the air pump can be placed above the water surface or below the water surface. It is more convenient.
4. One package need 10 pieces, and one air pump outlet need one this product which has high quality.
5. The no-return valves can prevent water from entering into air pump. It is an indispensable part of air pump.
10 x check valves
1. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors.
2. Due to the screen difference, the color may be a little difference from what you expect, please allow it.