The Basic Tube is 3" in diameter and comes 4' long. It can be used around machinery to catch drips or leaks or to contain a spill to a specific area. The Basic Tubes are designed with a needle-punched skin that draws the fluid to the center so it won't leak out. The durable fabric and hand sewn seams keep them from snagging and tearing due to rough environments. Lightweight with great absorption. Absorbs non-aggressive fluids.