2 O rings binders PR123-2-25/20 123mm R type,25 ring ... /20123mm R type,25 ring diameter,2 rings;2 ring binders ;ring binder;metal ring mechanism;loose leaf mechanism;******* Why ... main goods are stationery accessories like lever arch mechanisms, ring binders/loose leaf rings, wire/board clips, lever clips, spring/ ... cooperate with you. 2 O rings binder mechanisms (loose leaf binders): PR123-2-25/20