Our Roman blind system, incl. Chain control and Cord control-
* 509 system- easy go up & down by pulling chain continuously.
* 510 system- chain control, curved track with small gap, heavy duty by different ratio of control unit. Easy to adjust for even height.
* 508 system- cord control system, one track easy to install double shades, one in the front, one in the back. Or just use it for one shade, both available.
* 512 system- Simple track for roman blind, cord control, low cost design.
For more details, welcome further inquiry.