Bon 2 cord system
1.1. Find the weight range of your shade.
2. On the chart find the weight to figure out which system you will need.
3. Pick the length you need/want.
4. Find how many cords you have planned for your shade.
5. Pick the sizes you need.
6. The length available is 60, 72, 84 and 96
7. You can put more than one system on a shade based on the cords and weight.