External Corner Angle.
ECA are a standard size of 50mm x 50mm which come in different lengths to join panels at a 90° angle.
| Length | Weight |
| 3000 x 50 x 50 | 11.3 kg |
| 2700 x 50 x 50 | 10.2 kg |
| 2400 x 50 x 50 | 9.1 kg |
| 2100 x 50 x 50 | 7.9 kg |
| 1800 x 50 x 50 | 6.8 kg |
| 1500 x 50 x 50 | 5.7 kg |
| 1200 x 50 x 50 | 4.5 kg |
| 0900 x 50 x 50 | 3.4 kg |