| Nominal Size | 20 x 14 in |
| Fitting/Connector Type | Coupling |
| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | Royal Building Products | PLA N25-6020-14 | Concentric Increaser Coupling GxG N25602014 |
| | Royal Building Products | PLA C18-6020-14 | CONCENTRIC INCREASER COUPLING GXG (DR18) C18602014 |
| | Royal Building Products | PLA C25-1220-14 | CONCENTRIC INCREASER BUSHING SXG (DR25) C25122014 |
| | Royal Building Products | PLA C25-6020-14 | CONCENTRIC INCREASER COUPLING GXG (DR25) C25602014 |
