Support rail folds up against wall when not in use. Rail attaches to a plate that is fixed to the wall. Held up when not needed by a spring-loaded cam. Epoxy-coated steel tube has been treated against corrosion. Supports up to 140lbs. (63kg). Professional installation recommended. 1" (2.5cm) diameter x 22" (55cm) long. Also available in 30" (76cm) long (AA2002).