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 range Operating temperature : -55 celsius ~125 celsius Minimum shrink temperature : 60 celsius Starting temperature of solder melt : 138 celsius Temperature of fully solder melt160 celsius Color: Red, Blue, White, Yellow 80 white connectors: 1.7mm in diameter, 0.25-0.34mm in sectional area (AWG: 26-24); 100 red connectors: diameter 2.7mm, conductor cross-section 0.5-1.0mm (AWG: 22-18); 100 blue connectors: diameter 4.5 mm, wire cross-section 1.5-2.5 mm (AWG: 16-14); 50 Yellow connector: diameter 6.0mm, wire section 4.0-6.0mm (AWG: 12-10); 470x black heat shrinkable sleeve (diameter: 3.0mm, length: 20mm). ?Package included: 1x 800Pcs Heat Shrink Wire Connectors