note: all opera grilles have a ridge on the back unless they are for 2.25 inch width duct openings or the 20 by 25 inch, in which case they are flat. go to home page
| duct opening size | grille only | grille with damper |
| 2.25
by 10 inches (3 inches wide overall) |
$21.95 | n/a |
| 2.25
by 14 inches (3 inches wide overall) |
$23.95 | n/a |
| 4 by 8 inches | $27.95 | $44.95 |
| 4 by 10 inches | $29.95 | $47.95 |
| 4 by 12 inches | $32.95 | $51.95 |
| 4 by 14 inches | $36.95 | $55.95 |
| 6 by 6 inches | $29.95 | $47.95 |
| 6 by 10 inches | $42.95 | $60.95 |
| 6 by 12 inches | $44.95 | $63.95 |
| 6 by 14 inches | $52.95 | $71.95 |
| 6 by 30 inches | $138.95 | n/a |
| 8 by 12 inches | $51.95 | $69.95 |
| 8 by 14 inches | $56.95 | $76.95 |
| 8 by 8 inches | $34.95 | $52.95 |
| 10 by 10 inches | $41.95 | $60.95 |
| 10 by 14 inches | $65.95 | $85.95 |
| 12 by 12 inches | $69.95 | $89.95 |
| 14 by 14 inches | $78.95 | $98.95 |
| 14 by 24 inches | $145.95 | n/a |
| 14 by 30 inches | $159.95 | n/a |
| 20 by 20 inches | $165.95 | n/a |
| 20 by 25 inches | $255.95 | n/a |
| 20 by 30 inches | $265.95 | n/a |
| 24 by 24 inches | $285.95 | n/a |