Features: An easy one step connection of wires, soldered, insulated and sealed Can be ideal use in marine and automobile applications Polyolefin tubing in outside and hot melt adhesive in inside Solder and seal and with advanced waterproof function Polyolefin heat shrink butt connectors improved pullout strength, provides seal, strain relief, cable check, and insulation Specification: Insulation: PE Plating: Tin Terminal Body: Copper Operating temperature : -55125 Minimum shrink temperature : 60 Starting temperature of solder melt : 138 Temperature of fully solder melt160 Color: Red, Blue, White, Yellow 40 white connectors: 1.7mm in diameter, 0.25-0.34mm in sectional area (AWG: 26-24); 50 red connectors: diameter 2.7mm, conductor cross-section 0.5-1.0mm (AWG: 22-18); 50 blue connectors: diameter 4.5 mm, wire cross-section 1.5-2.5 mm (AWG: 16-14); 20 yellow connectors: diameter 6.0mm, wire section 4.0-6.0mm (AWG: 12-10); 340x black heat shrinkable sleeve (diameter: 3.0mm, length: 20mm). Package included: 1x 500Pcs Heat Shrink Wire Connectors