Reducer Coupler
| MM | Inches |
| 20 x 15 | 3/4″ x 1/2″ |
| 25 x 15 | 1″ x 1/2″ |
| 25 x 20 | 1″ x 3/4″ |
| 32 x 15 | 1 1/4″ x 1/2″ |
| 32 x 20 | 1 1/4″ x 3/4″ |
| 32 x 25 | 1 1/4″ x 1″ |
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| MM | Inches |
| 20 x 15 | 3/4″ x 1/2″ |
| 25 x 15 | 1″ x 1/2″ |
| 25 x 20 | 1″ x 3/4″ |
| 32 x 15 | 1 1/4″ x 1/2″ |
| 32 x 20 | 1 1/4″ x 3/4″ |
| 32 x 25 | 1 1/4″ x 1″ |
