Morris Products 10186 Butt Splice Connector, Vinyl Insulated, Yellow, 12-10 Wire Size  (Pack of 100) Vinyl Insulated Butt Splice Connectors - Restock your Vinyl Insulated Butt Splice Connectors with us. Vinyl Insulated Butt Splice Connector Material: High Strength Electrolytic Copper Plate or Tubular Copper Electro-Tin Plated for corrosion resistance Vinyl Insulated Butt Splice Connectors has Center Wire Stop Barrier Color Coded Insulation for easy identification