Metal Type: Authentic 99.9% Pure Solid Copper CDA #110 Hardness: Half Hard Gauge / Thickness: 18, 20, 22, 24 Gauge Shape: Bare Round Copper Wire Dimensions: .040" (1.02mm), .032" (0.81mm), .025" (0.64mm), .020" (0.51mm) Metal Type Authentic 99.9% Pure Solid Copper CDA #110 Hardness Half Hard Gauge / Thickness 18, 20, 22, 24 Gauge Shape Bare Round Copper Wire Dimensions .020" (0.51mm) Length 25 Feet / FT. Made In USA / by Craftwire USA