The West Penn 25224B Wire 18/2 Plenum rated communication cable has 0.015-Inch white PVC jacket to withstand harsh environmental conditions. This 0.008-Inch PVC insulation resists electrical leakage and offers protection against environmental threats. This unshielded cable has voltage rating of 300-Volts. It has capacitance of 30 pF/ft at 1-Kilo-Hz and resistance of 6.2-Ohm/1 m at 20 deg C. This bare copper cable of outer diameter 0.154-Inch, has bend radius of 1.4-inches. It withstands temperature range of -10 to 60 deg C. This bare copper cable is ideal for indoor within ducts, plenums and other spaces used for environmental air for intercom systems, security systems. This bare copper cable is UL/cUL/cETLus listed, RoHS compliant and meets NEC Article 800