4*6mm Aquarium CO2 dedicated tube high pressure resistant trachea, non-toxic and odorless air tube-1/2/3/5/10m
https://www.vogueparade.com/shopping/EN/200282142/1/1005003204723456/46mm-aquarium-co2-dedicated-tube-high-pressure-resistant-trachea-non-toxic-and-odorless-air-tube-123510m//