[Fast Connection] These solder connectors need to heat with a hot gun. Then it can be fast shirnking and firmly connect the wire together. No need for crimp tools. [4 Color identification] You can identify the cable range of this crimp connectors by the color. The connector range includes white (AWG 26 - 24), red (AWG 22 - 18), blue (AWG 16 - 14) and yellow (AWG 12 - 10). [IP67 Waterproof level] Double wall design. These heat shrink connectors design with polyolefin tubing on the outside and Hot Melt Adhesive glue on the inside. Creates a durable watertight seal between the wire and the connectors. Can also be used on humid environments. [Wide Application] Shrinking ratio: 2:1. It can be apply for daily use, automobile, Marine application. Also you it can be used on project such as festival lights. [Package Included] You will get 150 pcs 4 types solder seal wire connectors in the most commonly used sizes. (60 red, 40 blue, 40 white, 10 yellow solder connectors).Manufacturer: Feggizuli Package Quantity: 150 Part Number: UK150SolderConnectorsA Size: 150pcsFeggizuli 150PCS Solder Seal Wire Connectors Heat Shrink Wire Connectors, Waterproof Solder Seal Heat Shrink Wire Terminal Connectors Kit Marine Grade Heat Shrink Connectors Butt Splice Connectors