|  Polyvent 660 |  Polyvent 6601 |
| Range of sizes , [mm] | Ø102;127;152 | 110х54; 60х204 |
| Air duct base | PVC film (65 μm) | PVC film (65 μm) |
| Air duct wire | steel spring, 0.8 mm thick | steel spring, 0.8 mm thick |
| Temperature range, [оС] | -18...+70 | -18...+70 |
| Standard length, [mm] | 1000;1500;3000;6000 | 1000;1500;3000;6000 |
| Available lengths (cutting) , [mm] | 1000;1500;2500;3000;6000;15000;45000 | 1000;1500;3000;6000 |
| Air speed, [m/s] | 30 | 30 |
| Maximum operating pressure, [Pa] | 3000 | 3000 |