Ring Binder Mechanism with High Booster, Inclined D-Shape
STD-shape ring binder mechanism features a trigger, making it one of the most popular designs with our American customers.
| Item No. | Ring Distance | Total Height | Inner Height | Outer Width | Hole Distance | Total Length | Width of Mechanism |
| STD285-3-16/17 | 108/108 | 20 | 12.5 | 27.7 | 243 | 285 | 16.7 |
| STD285-3-25/17 | 108/108 | 31.5 | 22.9 | 35.5 | 243 | 285 | 16.7 |
| STD285-3-25/20 | 108/108 | 32 | 21.8 | 37.5 | 243 | 285 | 20.3 |
| STD285-3-38/20 | 108/108 | 45 | 35 | 44.5 | 243 | 285 | 20.3 |
| STD285-3-38/26 | 108/108 | 46 | 34 | 52 | 243 | 285 | 26 |
| STD285-3-52/26 | 108/108 | 60 | 49 | 55 | 243 | 285 | 26 |
| STD285-3-65/36 | 108/108 | 75 | 60 | 71 | 243 | 285 | 36 |
| STD285-3-76/36 | 108/108 | 86 | 70 | 76 | 243 | 285 | 36 |
| STD285-3-78/45 | 108/108 | 89 | 72 | 84 | 243 | 285 | 45 |
| STD285-3-102/45 | 108/108 | 118 | 98 | 82 | 243 | 285 | 45 |
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