Specifications:

Product Name: one way check valve

Material: environmental protection ABS

Caliber: 8 mm /0.31 inch

Length: 55 mm /2.17 in

Color: transparent, red

Package includes: 5 one-way check valves

Features:

The product is made of high-quality materials, durable, not easy to aging, long service life, and easy to hide.

Used for aquarium air pump, it can provide effective protection for your air pump and can be used with aquarium for a long time.

Easy to install, plug and play, 8mm one-way check valve can be used for most aquarium pumps.

The utility model can prevent the water in the aquarium box from forming backflow and damaging the air pump in case of power failure.

Note: do not use them with the CO2 system. These check valves are only applicable to ordinary aquarium air pumps.