Outside Diameter: approx. 12 mm, Inside Diameter: approx. 8 mm Made with food grade natural silicone with smooth walls; one long continuous piece makes it flexible to be cut into desired length to meet your needs Crystal clear tubing provides excellent resistance to chemicals; heat resistant up to 320 degrees Celsius Could be widely used in pumps, shiphons, filters, AC and HVAC tubing, drain valve connections, filters, plumbing, drip irrigation, ponds, gardens and so on Please preserve the tubing in a cool and dry place; the heat, sun and extreme cold may shorten its lifespan, Weight: 0.2261501883596 pounds, Manufacturer: Labasics Scientific