The plastic tube PFR is a closed design with excellent protection from dirt and damage caused by chips or the like. In the types PFR 123, 223 and 323 the cables are kept in two separate chambers. PFR with metallic finish is a ekd specialty that mainlz occurs in applications with hot chips and sparks. Due to the high surface temperature conductivity and scratch resistance there are no limits for this surface coating. In addition this type has an exceptionally high quality look with the shiny metallic surface.