| irp.category.partno | I.D. (IN) | Approx Weight | Positive Pressure | Negative Pressure | Centreline Bend Radius | |
|---|
| GN-1 | 1 | 0.136 | 30 | 29 | 1 | |
| GN-1.5 | 1-1/2 | 0.171 | 30 | 29 | 1.2 | |
| GN-2 | 2 | 0.252 | 30 | 29 | 1.7 | |
| GN-2.5 | 2-1/2 | 0.302 | 30 | 29 | 2 | |
| GN-3 | 3 | 0.353 | 30 | 29 | 2.4 | |
| GN-3.5 | 3-1/2 | 0.405 | 30 | 15 | 2.8 | |
| GN-4 | 4 | 0.486 | 30 | 21 | 3 | |
| GN-5 | 5 | 0.599 | 29 | 11 | 3.6 | |
| GN-6 | 6 | 0.618 | 19 | 5 | 4 | |
| GN-8 | 8 | 0.950 | 11 | 4.3 | 4.5 | |
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