2mm ID x 4mm OD pre-cut flexible silicone tubing. High quality, flexible silicone compound in compliance with FDA and 3A Sanitary Standards. Flexible tubing for air, water, food, and beverage - durometer: 50A 【Good Performance】Lightweight, flexible, and crystal-clear, tubing provides excellent resistance to chemicals, solvents, alkalis, and acids. Smooth inner surface for easy flow and easy cleaning. BPA Free and non-toxic. 【Industrial Application】This extremely flexible, food grade silicone is suited for general low pressure industrial applications for the conveyance of chemicals, liquids, gases, and solids of suitable granular size, such as factory air lines automation machinery and pneumatic lines. 【More Application】Its many suitable uses include pumps, shiphons, filters, AC and HVAC tubing, drain valve connections, filters, plumbing, drip irrigation, ponds and gardens, beer brewing, wine making, and more. Great for fluid handling, peristaltic pumps, siphoning, draining, aquaponics and water/oil change, etc. Because of its versatility and the ability to be used in a wide range of applications, it is a great value for your money. If you're tired of hard PVC hoses that crack or collapse when bent, try using silicone tubing instead. Once you use silicone tubing, you won't go back. Silicone is UV resistant; it does not age and deteriorate outdoors. The tube is very pliable and stretchy, allowing you to make tight turns and stretch it over barbs that are a little too big. This type silicone tube is very versatile - common uses are small water pumps such as PC water cooler radiators, blocks and pumps, small pumps for fountains, solar, coffeemakers, and other applications. This tube has a thick wall so it can accommodate a bend radius. U-turn without the tube collapsing when empty. And what is so awesome about silicone, is that even if it collapses, it will spring back without any creases, because the material is incredibly stretchy and resilient to damage.