1:It is high strength,durable,scuff resistant, 2:corrosive resistant,fire resistant. Material: A high quality very flexible Flame Retardent ducting made from PVC coated Nylon fabric and combining a fully encapsulated, robust semi-spring steel wire helix. Available in the following colours: Black, Blue, Grey.Green,Yellow,Red,White, OrangeDiameters: 150mm - 1000mm.Density:40 Standard Length: 10m or ...