Easy to install and use, just need to connect the air pump and air stone and place it in the desired position in the fish tank.
Premium material: This aquarium air valve is made of high-quality plastic material, which is odorless, non-toxic, durable, and has a long service life.
Function: This check valve can effectively prevent water backflow and air leakage, and maintain a stable water level in the fish tank.
Package includes: 2 pieces of aquarium check valves. The size of Air hole diameter is about 4mm.
Detachable design makes cleaning and repair easy. Loosen the screw and open it.
