Ring Binder Mechanism - 4 D Ring  
    Making your own presentation binders? We supply 4 D-ring mechanisms in various sizes and quantities.
| 
 Ring Capacity  | 
 Mechanism Base Width  | 
 Pack Size  | 
| 
 25mm  | 
 21mm  | 
 210  | 
| 
 40mm  | 
 27mm  | 
 125  | 
| 
 50mm  | 
 27mm  | 
 90  | 
| 
 65mm  | 
 38mm  | 
 72  | 
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