Heat shrink connector kit Heat Shrink Butt Connectors Terminals, ELECTRAPICK Insulated Waterproof Electrical Wire Terminals Kit Marine Automotive Wire Connectors Crimp Terminals (3 Colors / 3 Sizes) ·         Dual-walled design, polyolefin tubing in outside and hot melt adhesive in inside. ·         Waterproof : widely used in marine and automobile applications. ·         Butt connectors with heat activated adhesive protect against corrosion and vibration ·         Crimp connectors have thick copper barrels to tightly grip any wires ·         Heat shrink butt connectors use tinned copper barrels for highest conductivity ·         3 Sizes(120pcs): Yellow 12 - 10 AWG (40pcs) Red 22 - 18 AWG (40pcs), Blue 16 - 14 AWG (40pcs) ·         3 Sizes(200pcs): Yellow 12 - 10 AWG (20pcs) Red 22 - 18 AWG (90pcs), Blue 16 - 14 AWG (90pcs) Color AWG Wire Range Copper Thickness Red  22 - 18  0.5-1.0 mm2  0.8mm Blue  16 – 14  1.5-2.5 mm2  0.8mm Yellow 12 - 10  4.0-6.0 mm2  1.0mm Specifications: --Shrinkage ratio 3:1 --Dual-walled design tubing: polyolefin tubing on the outside and hot melt adhesive in inside --Wire gauge imprint on connectors --Selection of 3 connector sizes ensures the right terminal for every application --Minimum shrink temperature: 80°C --No wire damage due to lower shrink temperature --Full recovery temperature: 130°C --Operating temperature: from -55°C to 125°C --Reusable case included