| Nominal Size | 21 x 21 x 12 in |
| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | Royal Building Products | PLA K3021-12 | WYE PROFILE HHH K302112 |
| | Royal Building Products | PLA K1021-12 | TEE STR PROFILE HHH K102112 |
| | Royal Building Products | PLA K1521-12 | T-Y HxHxH K152112 |
| | Royal Building Products | PLA K3321-12 | WYE PROFILE HHG K332112 |
| | Royal Building Products | PLA K10321-12 | TEE STR PROFILE HHG K1032112 |
| | Royal Building Products | PLA K15821-12 | T-Y with SDR35 Branch HxHxG K1582112 |
