Black Insulated In-Line Splice 250 - 6 - Marked Insulated Splice for easy identification.Features :Insulated splice with rugged high-dielectric rubber/vinyl coating.Pre-filled with oxide inhibitor.Insulated splice provides easy re-entry for changes, inspection or troubleshooting.Plugs marked with connector max wire size for easy identification.6061 aluminum dual rated for use with copper and/or aluminum wires.UL/CSA certified through 600MCM size.Rated 90degreesC 600 Volt.One wire per terminal.SpecificationWire Range: 250 - 6Allen Hex: 5/16 in.Length: 4.00 in.Width: 1.13 in.Height: 2.25 in.Item weight - 0.2 lbs.