Our best selling tubing is our clear vinyl tubing and clear braided tubing. Both styles of tubing are made of non-toxic PVC. Unisource clear vinyl tubing is used in the food and sanitary industry, as well as the agricultural segment for use as sight tubing. Unisource offers nylon air brake tubing as well. See our Specialty Hose section. Contact Unisource for information on other styles of tubing, such as black rubber, pure gum, silicone, or other types of tubing.