Product Name: Ring Binder Mechanism Place of Origin: China Size: 2.3.4.5.6.7.20.26(R, Q, D)89,105,123,130, 133, 158,171,175,190,210,216,241,264, 280, 292/15, 17,20, 26, 36 Type: Pull open & Trigger We can supply different mechanisms for file folders, such as lever arch Mechanisms, Lever clips, board clips,Wire Clips,Spring Clips,Ring Mechanism,Eyelets,Rivets etc.. It's a good opportunity! We look forward to hearing from you.