| Part No. | I.D. (IN) | Approx Weight | Centreline Bend Radius | Negative Pressure (INHG) | Positive Pressure (PSI) | |
|---|
| GN-1 | 1 | 0.136 | 1 | 29 | 30 | |
| GN-1.5 | 1-1/2 | 0.171 | 1.2 | 29 | 30 | |
| GN-2 | 2 | 0.252 | 1.7 | 29 | 30 | |
| GN-2.5 | 2-1/2 | 0.302 | 2 | 29 | 30 | |
| GN-3 | 3 | 0.353 | 2.4 | 29 | 30 | |
| GN-3.5 | 3-1/2 | 0.405 | 2.8 | 15 | 30 | |
| GN-4 | 4 | 0.486 | 3 | 21 | 30 | |
| GN-5 | 5 | 0.599 | 3.6 | 11 | 29 | |
| GN-6 | 6 | 0.618 | 4 | 5 | 19 | |
| GN-8 | 8 | 0.950 | 4.5 | 4.3 | 11 | |
+with+Small+Canadian+Flag.png?language=en "IRP Rubber")
