Tubing is a crucial component for water to circulate in your water garden. It acts as an artery between water control elements and as a decorative accessory allowing the essential water flow for waterfalls and streams. Sunterra tubing is flexible and withstands most kinks and compression. The black color blends with different backgrounds, allowing it to be easily concealed. This tubing measures 1/2" internal diameter and comes in a 20' Roll.