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Adaptaflex® Type SPUL Liquid Tight Covered Steel Conduit - Material Galvanized Steel Core W/Copper Packing & PVC Cover - Color Grey - Conduit Size NC20 (US Trade 1/2") - Out Dia 21.1mm - In Dia 15.9mm - Static Bend Radius 80mm - Reel Length 50m - IP66, IP67