The Justin Johnson Signature Slide was designed to be the most versatile slide available, and take the best qualities of glass, metal, ceramic, bone, and wood slides, without the various drawbacks from those different materials. This dense, thick-walled, stoneware ceramic slide has a perfect balance and weight, somewhere between glass and metal. The silicate glaze gives the tone of a glass slide, but with a much longer, more pronounced sustain. The other half of the slide is unglazed, raw ceramic which gives a rough, rattlesnake-like growl. This is a true tone machine!