Protan is to deliver 2000 m with 1400 mm and VF coupling and 1700 m with
1200 mm and VF coupling. Ventiflex 9109FR quality is primarily intended for excavations and short tunnels. The new quality is yellow on both sides and is a low cost product suitable for many different applications.
Rolf Halvorsen has been working in the development of this new Ventiflex 9109FR quality and says that Protan will market the product onto well-established markets
such as Switzerland, France, Germany and Austria.