Features:  -EASY AND FAST PROCESS: All-in-one step solder and seal process. No need for crimp tools and soldering machine. Timer and mess saver.  -WATERPROOF AND INSULATION: Dual-walled design - Outside Polyolefin tubing provides insulation and improves pullout strength; Hot Melt Adhesive & Solder inside ensures wires tightly connected and avoids wires slipping out of the terminal.  -STAY ORGANIZED: Our connectors come within a storage box, easy to store and carry. Color-coded tubing makes it easy to identify the right size of the connector for every application.  -WIDE APPLICATIONS: Shrinking ratio: 3:1. Ideal used for Automotive, Boat, Marine and other Outdoor Applications.     Specification:  Quantity: 50PCS;  Material: Tinned Copper;  Voltage: Max. 600V;  Shrink Ratio: 3:1;  Start Shrink Temperature: 80 ℃;  Fully Shrink Temperature: 130 ℃;  Operating Temperature: -55 ℃ -125 ℃.    Size:  YELLOW 12-10 A.W.G 4.0-6.0mm²;  BLUE 16-14 A.W.G 1.5-2.5mm²;  RED 22-18 A.W.G 0.5-1.0mm²;  White 26-24 A.W.G 0.25-0.34mm².     Package Included:  50pcs Solder Seal Wire Connectors.