Cast Iron W Channel offered by us, provides an energetic accent to any hardscape area with its dynamic, interlocking gear design. Although our cast iron cover is designed to suit a variety of channels, we recommend using our own poly-concrete or plastic channels. This channel is very easy to install as well as simple to use. Cast Iron W Channel is available at very inexpensive costs from us. This channel is very cost-effective and can be easily purchased by our valued customers, at nominal pricing, in bulk quantities.