Specifications Brand New 500 Foot CL3 Four Conductor Speaker Wire 16 Gauge, 65 Strand and SRPVC Ultra Flexible Insulation UL Listed for All In-Wall and In-Ceiling Speaker Applications Sunlight Resistant and Burial Grade for All Outdoor Speakers Use for All Class 2 and 3 Circuits ROHS Compliant for a Cleaner Earth ETL Certified Oxygen Free Copper (OFC) 100 Foot and 1000 Foot Rolls Available