metal clamp, metal ring binder,metal clip, 6 O ring binder size: TR216-6-25-20 material; metal color; nickle OEM are welcome metal clamp, stationery clip/metal clip/metal clamp/metal ring binder/ring mechanism6 O ring bindermodel: TR216-6-25-20. TR216-6-19-20material; metalcolor; nickleOEM are welcomewe are professtional in making all kinds stationery clip and hardware accessories, we can give ...