[Product specifications:]:]

diameter5cm. Long30cm air inlet4mm or8mm dual use (recommended8mm trachea)

diameter5cm. Long16cm air inlet4mm or8mm dual use (recommended8mm trachea)

diameter4cm. Long21cm air inlet4mm or8mm dual use (recommended8mm trachea)

diameter4cm. Long11cm air inlet4mm or8mm dual use

[Product features:]:]

this product needs to be used with a high-power air pump. Suitable for large fish pond and aquarium. High-temperature sintering gas column is made of high-temperature sintering, which is different from ordinary commercially available bubble stones. The material is strong and durable,

it can be cleaned repeatedly and used for a long time.

[Instructions for use:]:]

please use the air pipe (need to buy separately) to connect gas column, and the other end of the air pipe is connected to the Air Pump (need to buy separately), which can add check valve to prevent water backflow from damaging the air pump.

Please soak this product in water before use15 minutes.

Long-term use, such as dirt blocking and bubble reduction, can be taken out for cleaning and repeated use.