The 1/2 in plywood panels are attached to an aluminum heat transfer sheet|Cut your labor in half with Uponor's fully assembled Quik Trak® panels, which consist of six panels fastened together with strapping tape|The panels are staggered 2 inches on both ends to aid alignment|Quik trak return panels are designed with a U-shaped groove to complete tubing turns|Each return panel is shipped with a separate aluminum sheet for installation beneath the panel|Aluminum backing materia