The system includes:

(A) Flexible track with enough length to fit the perimeter of your window opening.
(B) Roller, in sufficient quantity corresponding to the length of track,to insert into the track in order to hold your curtain in place and to open or close the curtain easily.
(C) Snap button cloth for fast and easy attachment of all required rollers. This cloth is to be sewn onto back of curtain first.
(D) Mounting cartridge to fasten the track onto either window's inner frame or outer wall. D1 is for former, D2 is for latter.