Parallel corrugated protective hose SILVYN® RILL PA12 21 / 16.5X21.2 BK 50M, Parallel corrugated protective hose, Inner diameter: 16.5mm, Outer diameter: 21.2mm, Nominal size: 21, Polyamide, Halogen-free, UV-resistant, Areas of application: Outdoors (in black), Mechanical engineering, In energy chains (SILVYN® CHAIN), Building automation, Robot construction, Benefits: Highly flexible / cold-flexible, Pressure-resistant, Dimensionally stable, Flame-retardant, self-extinguishing according to UL 94V-2, Highly flexible