[Simple as Can Be]Using this solder kit is a cinch. Just heat the wire connectors and shrink tubing with a hot air ! and amateurs alike can do it in a snap. [Color Coded]Never reach for the wrong piece again. The color coding system categorizes each piece by length and diameter, making your job much easier. [Designed for Durability]The high polymer shrinks quickly, provides insulation and is 100% waterproof. Each piece will outlast repeated wear and tear without slipping or tearing. [ Possibilities] kit is great for a wide of electrical repairs. It's a must for data protection, automotive, and outdoor applications. HOW TO USE: Select the proper size connector for the wires, stripped wires. Insert the stripped wires into the connector. Apply heat evenly to the connector from the 2 ends first until tubing shrinks and the adhesive flows, then continuously apply heat evenly until solder sleeve and seal. Note: For , please use a hot air and rotate the connector to evenly apply heat. Please raise the temperature from low to high gradually when you use the hot air to heat the . Please DO NOT set the high temperature at the beginning, or the surface of connector will be over-heated, which will lead to the tube while the solder ring still not . Keep the hot air at the proper distance. 't too . Shrinkage 2:1 Minimum shrink temperature: 80C Minimum temperature for solder to : 138C Operating temperature :-55 - 125 Waterproof : IP 67 Material:Metal + plastic Colour:Red, blue, white, yellow Package Contents: 150 * waterproof shrink-wrap ring terminals (50 x red shrink connector AWG: 22-18, 50 x blue shrink connector AWG: 16-14, 40 x white shrink connector AWG: 26-24, 10x yellow shrink connection AWG: 12-10) 1 *plastic box Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.