DN21 metal flexible tube with sendzimir galvanized steel strip, with PVC outer cover, waterproof and self-extinguishing, with an IP65 protection rating. Recommended for the mechanical protection of electrical conductors. The flexible tube ECOFLEX is installed with fittings RM, RGm, RMH, RMM for connection to equipment or boxes. Grey color (RAL 7031).Operating temperature: -5 ° C to + 60 ° C. Line meter price (minimum order: 25 meter Reel).