| Nominal Size | 21 x 21 x 18 in |
| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | Royal Building Products | PLA K3321-18 | WYE PROFILE HHG 21 x 18 K332118 |
| | Royal Building Products | PLA K1521-18 | T-Y HXHXH 21 x 18 K152118 |
| | Royal Building Products | PLA K3021-18 | WYE PROFILE HHH 21 x 18 K302118 |
| | Royal Building Products | PLA K10321-18 | TEE STR PROFILE HHG 21 x 18 K1032118 |
| | Royal Building Products | PLA K1021-18 | TEE STR PROFILE HHH 21 x 18 K102118 |
| | Royal Building Products | PLA K15821-18 | T-Y WITH SDR35 BRANCH HXHXG 21 x 18 K1582118 |
