Options Details
M01 inner Dia: 0.35inch/9mm. Suggested: Material with certain flexibility make our tube adapt to inner head with diameter of 0.35-0.39inch/9-10mm (Please you can also find more measurement details in the photo)
M02 inner Dia: 0.47inch/12mm. Suggested: Material with certain flexibility make our tube adapt to inner head with diameter of 0.47-0.51inch/12-13mm (Please you can also find more measurement details in the photo)
M03 inner Dia: 0.63inch/16mm. Suggested: Material with certain flexibility make our tube adapt to inner head with diameter of 0.63-0.67inch/16-17mm (Please you can also find more measurement details in the photo)
M04 inner Dia: 0.71inch/18mm. Suggested: Material with certain flexibility make our tube adapt to inner head with diameter of 0.71-0.75inch/18-19mm (Please you can also find more measurement details in the photo)
M05 inner Dia: 0.79inch/20mm. Suggested: Material with certain flexibility make our tube adapt to inner head with diameter of 0.79-0.83inch/20-21mm (Please you can also find more measurement details in the photo)

Material: environmentally friendly, durable, sturdy flexible plastic, odorless, 100% free from toxins. Suitable for both fresh water and salt water fish tank.

Flexible tubing will not harden, It can be bending without broken; Safe for salt and freshwater aquatic environments. Great accessories for your Fish tank, Water pump, Fountain pump, Filtration system etc.

Tips: For a better connection, before you use, please wet the connector and aquarium tube to get a easily install. You can put the end of the tubing in hot water for a little bit and it will make the tubing go on better.

Hi, dear. Any question please feel free to contact me firstly. I will try my best to help deal with your problems in a short time as soon as I receive your message.