Check the listing for details. 100 Feet 3/16-Inch Professional Aquarium Black Flexible Silicone Air Line Tubing. Condition: New. Listed at 27.59 USD. 100 Ft, 3/16-inch Silicon Air Line Tubing for Aquariums, Terrariums, Hydroponics FEATURE Fit all standard 3/16-inch outlets, including air pumps, check valves, filtration system, air stones, and aquarium ornaments. Made for use in hydroponics systems, aquariums, and terrariums. Black silicon airline tubing can easily hide and blend into your hydroponics system, aquarium, terrarium.Black silicon airline tubing is resistant to CO2 corrosion.Soft, flexible, pliable silicon tubing that will not harden or kinking. Stands up to wear and will not crack or become brittle over time.Safe material that is non-toxic and harmless for fish health. Good for fresh or saltwater environments. DESCRIPTION Opaque Black Silicone Air Tubing is UV resistant, and the black tint helps block light that may enter your reservoir through the tubing. Tubing thickness is approx. 1 mm that is 25% thicker than the cheap tubing in the market. It can bear higher pressure application for deep water aquarium or CO2 system. INCLUDES:100 Ft Silicon Airline Tubing