Schluter-DILEX-BT is an expansion joint made of aluminum or brass with lateral joint connections to a sliding telescopic centre section. This allows for absorption of three-dimensional movement. Schluter-DILEX-BT/O can be used to create expansion joints at floor/wall transitions. Schluter-DILEX-BTS is added to completed surface coverings. Schluter Dilex-BT is sold per 8' piece