Check the listing for details. Clear PVC 4mm Professional Durable Clear Flexible Airline Tubing for Aquariums. Condition: New. Listed at 8.99 USD. Clear PVC 4mm (0.16 Inch Inside Diameter) Professional Durable Clear Flexible Airline Tubing for Aquariums Clear PVC 4mm (0.16 Inch Inside Diameter) airline tubing,Extended wear and tear; This standard 4mm (0.16 Inch Inside Diameter) tubing is great .Great for all your aquarium airline needs .Clear and flexible tubing that resists kinking .Safe for fish and good for fresh or salt water environments .Fits seamlessly in any home aquarium and virtually disappears in the water. Non-toxic so it will not harm your fish.Made from clear, flexible plastic. This airline tubing is built to last and withstand wear and tear. It is also resistant to kinking. Material : Plastic; Color : Clear, White . Package Content : Length size - select . Length size : 8 Feet Length size : 25 FeetLength size : 50 FeetLength size : 100 Feet This professional silicone airline tubing is clear, flexible, and durable! Made for use in aquariums, terrariums, and hydroponics systems. Designed to fit all standard outlets, including air pumps, check valves, filtration system, air stones, air flow control levers, and aquarium ornaments. Made of silicone. Easily hide and blend into your aquarium, terrarium, or hydroponics system. Great for use with aquarium ornaments, bubblers, Blue Spotted Air Stone Discs & air stones, and a variety of air driven filters.