Clean, smooth metal interior for easy wire-pulling and requires no special tools for cutting or bending Type UL sunlight resistant and integral copper ground wire for use where UL Listing is required Provides the safest possible protection from moisture, oil, chemicals, acid, alkaline and the ozone Tough Ultrabond, anchored polyvinyl chloride, extruded cover seals the spirally-wound, square-locked flexible galvanized steel core Eliminates maintenance and downtime due to wiring failure Approved for use in temperatures from 80 degrees Celsius dry, 60 degrees Celsius wet, 34 degrees Celsius cold PVC jacket is made with a sunlight resistant UL compound.