Heavy Duty 3 Ring Binder Mechanism 3 Hole Stationery File Clip - China 3 Ring Mechanism, Stationery Accessories | Made-in-China.com
Amazon.com : Shuokecrafts 5Pack 2-Ring Binder Mechanism Spines for Top-Binding, 2 D-Rings (30mm(26mm Base Width)) : Office Products
Avery; Magnetic Hanging Binder Rings, 3 Ring Binder, 1.5" Slant Rings, Holds 375 Sheets (77715) - 1 1/2" Binder Capacity - 375 Sheet Capacity - Slant Ring Fastener(s) - Metal - Wrin | Bundle of 5 Each - Walmart.com
Ring mechanism 4 rings for DinA4 ring binders, can only be ordered in connection with an order of an A4 ring binder
Ring Book Mechanisms (Ring Binders) | TALAS
Buy 4-ring ring binder mechanisms (from 1 piece) | Magnetpartner
Binder Ring Mechanism 3-Ring, 2" Slant 'D' Letter SizeQuality Locking - Bar C Saddlery
Rust-Proof Two-Ring Metal Binding Clip Office Supplies O-Shaped Metal 2 Ring Binder Clip - China Ring Binding Clip, Ring Binder Clip | Made-in-China.com