Outside Diameter: approx. 12 mm (7/16 inch), Inside Diameter: approx. 8 mm (5/16 inch) Made with premium natural rubber latex with smooth walls; One long continuous piece makes it flexible to be cut into desired length to meet your needs Strong and highly resilient with a maximum elongation of 700 percent Could be widely used in general laboratory applications Please preserve the tubing in a cool and dry place; The heat, sun and extreme cold may shorten its lifespan Our Lab accessories are supplementary items designed to support and enhance laboratory work. Common examples include rubber stoppers, clamps, tubing, and stands, which are used to connect, secure, or stabilize laboratory equipment and setups. These accessories help ensure safe, efficient, and organized experimentation in scientific, educational, or research environments.