Staging 101 Choral Risers are constructed high quality plywood and steel and feature a 10 year warranty. What makes Staging 101 risers unique is that straight and wedged sections can be combined together easily to form different configurations (many competitor's risers do not have this option). 2 tier wedged choral risers consist of 2 seperate riser panels in 8" and 16" in heights. They are available in a Carpet or Industrial finish. Please choose from the options available.