The Spiral Wire Brush Foam Pig is a good cleaning pig for removing normal amounts of scale and deposits. The wire brushes rub against the pipe wall loosening weld slag, rust, and other unwanted agents. The spiral wire brush can be modified to accommodate transmitters, magnets and/or radioactive sources. The spiral wire brush can also be outfitted with pull ropes to make pig removal easier. Spiral Wire pigs come in soft (2lb), medium (5lb), or high (9lb) foam densities.