| Length | 20 in |
| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | SOUTHWARK METAL MFG CO | SOU 6S20 | 6S 19-3/4'' S-CLEAT 6S20 |
| | SOUTHWARK METAL MFG CO | SOU 277F202016 | 277F 20X20X16 CEIL OUTLET 277F202016 |
| | SOUTHWARK METAL MFG CO | SOU FR1420 | FILTER RACK 14X20 FR1420 |
| | SOUTHWARK METAL MFG CO | SOU FR1620 | 16X20 FILTER RACK FR1620 |
| | SOUTHWARK METAL MFG CO | SOU 312020 | 31 20X20 RETURN AIR FRAME 312020 |
| | SOUTHWARK METAL MFG CO | SOU FR2020 | FILTER RACK 20X20 FR2020 |
