Cross bars are what connect differentuprights and drapes. These parts can be either standard sized or telescopic. Usually, the standard sized can be used to support drape ranges from 1’ to 10’, while the telescopic type can be much longer. Of course, standard sized can also be custom manufactured.
In installation, the small hooks on each end of the bars will be placed into the slot on the top of the uprights. Of course, the drape will be first hang on the bars before connecting the bars and the uprights. If a single bar is not long enough for the occasion, some other ones are to be connected.

. The length can be standard or telescopic
. Support draperies firmly
. Ranges from 1’ to 10’ or other telescopic length
. Tough hooks connects uprights