Black Premium Tubing
The Cobalt Aquatics Black Premium Silicone Airline is made of natural
silicone that resists kinking, hardening, and breakdown. Suitable for
use with air pumps, dosing systems, CO2 reactors and injectors, and
more. Cobalt also has other colors of airline tubing. Using multiple colors of
tubing makes it easy to keep track of multiple airlines in your dosing
system. 13 feet long.