I flexible pipes are used where rigid pipes cannot be applied. The total length is expressed in millimetres, including terminals and threads. Material: stainless steel, internal helical corrugated AISI321; external coating and connection terminals AISI304. The conduit pipes for the passage of conductors are made of Fe360 steel, galvanised inside and outside UNI5745. The pipes are supplied in 6-metre bars, with male threads at both ends GK UNI6125 (or NPT), complete with sleeve UNI7683.