25-foot roll of 3/16" black tubing. 

The Flex-Tube Piping System is a very easy way to install an automated watering system that mounts directly to the outside of wire mesh cages.

• Black Tubing prevents algae growth in water lines.   Because the tubing is black, it blocks light, preventing algae growth.
• The tubing used in the Flex-Tube System is a soft, non-toxic plastic material. 
• Can be cut to length using scissors.