Grow1 White Vinyl Tubing, 3/16 Inch (ID), 1000 FeetGrow1 White Vinyl Tubing Made from strong and durable vinyl material, these tubes are available in a variety of sizes and lengths, great for use with air or water. The tube walls are thick and flexible, and you may also choose between the 100% opaque black vinyl, which prevents algae growth, or the clear vinyl that allow for complete visibility If you are using accessories such as basket drippers and air stones use (ID) 3 16" instead of (ID) 1 4"