Steel pluggable rigid tube with anticorrosive interior primer, 20mm outer diameter (18mm inner diameter)- DN20. specially suitable for installations that require high mechanical performance and medium resistance to corrosion. IP54 protection index. It is supplied in 3 meter long sections. N Aenor Marking according to IEC 61386 standard. Made in steel, electrogalvanized finish. Operating temperature: -45°C to +400°C. Price of linear meter (Minimum 3 meters).