All cords are compatible with all addiClick systems. The only difference is that the lace version (item no. 659-7) has cords that are 63cm long, while the standard version (item no. 759-7) has cords that are 55cm long. This version here is preferably used for the normal long needle tips. You shouldn't combine these cords with the long lace tips here, i.e. short cord with long tips, that would no longer be possible to knit.