| Serial # | Inside Diameter | Wall Thickness (MM) () | Max. Hose Length (MM) () | |
| MM | INCH | |||
| GZ1 | 3 | 1/8 | 2 | 3000 |
| GZ2 | 4 | 1/6 | 2 | 3000 |
| GZ3 | 5 | 1/5 | 2.5 | 3000 |
| GZ4 | 6 | 1/4 | 2.5 | 3000 |
| GZ5 | 8 | 3/10 | 3 | 3000 |
| GZ6 | 9 | 4/10 | 3 | 3000 |
| GZ7 | 10 | 2/5 | 3 | 3000 |
| GZ8 | 13 | 1/2 | 3.5 | 3000 |
| GZ9 | 16 | 5/8 | 3.5 | 3000 |
| GZ10 | 19 | 3/4 | 4 | 3000 |
| GZ11 | 22 | 6/7 | 4 | 3000 |