Set of magnets, runners, and stoppers for curtain rails. - Set includes: Magnets: 2 pieces, 1 set Runners: 14 pieces Stoppers: 2 pieces with screws - Material: Plastic and metal - Color: White - Application: Accessories for curtain rails to hang curtain hooks Thank you for viewing. For a window with a width of 80-90cm on one side and 7 pleats, one runner will be left over, and a total of two will be left over for both sides. The stoppers require a little skill to install. Make sure the screws don't protrude too much from the metal fittings, and insert the fittings, the last runner, and the stopper into the rail in that order as shown in the photo. Then, adjust the position of the fittings, sandwich the runner, and secure the stopper by clamping it to the rail with the screws on the fittings. Please consider purchasing this item with the understanding that it is a used item that came out of storage.