Pacer Group 12-10 AWG Heat Shrink Butt Connector - 25 Pack One Size. Step-down butt splices are meant to connect a higher-gauge wire to a lower-gauge wire. They could also be used to connect two or more smaller-gauge wires to a single wire. When selecting which type to get pay special attention to whether they are epoxy lined or not. Many manufacturers do not line the interior of their butt splices with meltable glue. This epoxy reacts to heat and expands creating a superior environmentally sealed connection.Features:Made from tinned copper and various insulationsUp to 600 VoltsNot applicable to all stylesOperating Temp: -55C to 125CUL CSA RoHS CompliantBenefits & ProtectionsImpact ResistantMultiple UsesLong Term ProtectionEasy to InstallSpecifications:Wire Range: #12-10 AWGInsulation Color: YellowMax Wire Insulation Outer Diameter (inch): 0.28"Package Size: One-hundred Package Contents: Pacer Group 12-10 AWG Heat Shrink Butt Connector Pacer Group TBSE10-25: 12-10 AWG Heat Shrink Butt Connector - 25 Pack One Size