High quality PVC replacement strips - no 'lakes' or 'bubbles'.Extruded to provide an enhanced seal to maximize energy savings.Less friction drag than standard PVC strips for easier passage of traffic.Improved aesthetic - reduce damage from scratching and abrasions.Ribbed PVC strips have improved durability and an enhanced life span.Compatible with all Slingsby door kits.Roll length - 50m.Colour: clear for visibility (Other sizes and colours available on request) .