Material: mild steel -2.0mm
Surface treatment: hot dip galvanized
Mesh: zinc plated round bar -dia 5mm
Seal:single-EPDM strip
| Item code | Spec | External dimensions mm | Clear opening mm | Height mm |
| 310301 | 300*300 | 330*330 | 200*200 | 70 |
| 310302 | 400*400 | 430*430 | 300*300 | 70 |
| 310303 | 500*500 | 530*530 | 400*400 | 70 |
| 310304 | 600*600 | 630*630 | 500*500 | 70 |
| 310305 | 700*700 | 730*730 | 600*600 | 70 |
| 310306 | 800*800 | 830*830 | 700*700 | 70 |
| 310307 | 900*900 | 930*930 | 800*800 | 70 |
| 310308 | 1000*100 | 1030*1030 | 900*900 | 70 |
| 310309 | 1100*1100 | 1130*1130 | 1000*100 | 70 |