Primacoustic MID-WALL Wall Track, Mid-Wall 4' Top Load 2", Square - Black, 10 PackThe TelaWall Track System The Telawall track system includes two types of track pieces: Perimeter Tracks for outside edges and Mid Wall Tracks to join two sections of paneling together. Both of these track types accommodate heavy fabric types and 2 thick panels to allow for acoustic absorption throughout the frequency spectrum and not just in the vocal range. Primacoustic track is built from durable and recyclable PVC that can be cut to size if