Motion Pro is dedicated to producing the most versatile, unique and durable products for professional and home use. Motion Pro tools are designed to be simple to use, yet durable enough to withstand the harshest conditions. One of their goals is to offer tools of convenience. Do it right the first time with Motion Pro Tools. Constructed of plasticized PVC. Soft flexible tubing. Smooth hard bore helps prevent interior build up. Recommended for venting and overflow lines. Sold in 25 foot rolls. Safe flexible down to 0 degrees Fahrenheit. Maximum dry heat temp is 220 degrees Fahrenheit. Made in the U.S.A. Notes: Use stepless clamp (sold separately) to install. NOT for use with fuel injected engines.