This Marine Metal Silicone Air Line Tubing is a high-quality product that is perfect for aquariums and fishing equipment. It has a length of 6 feet and a diameter of .140id x .230od. Made by a trusted brand, Marine Metal, this tubing is durable and made to last. Please note that this product contains a chemical that is known to the State of California to cause cancer and birth defects or other reproductive harm. However, this does not affect the quality or functionality of the tubing. It is important to handle and use this product with care to avoid any potential health risks.