【Easy Identification 】: Color-coded tubing makes it easy to identify the right size of the connector for every application. Measure your wire, and easily choose the right connector by looking at wire size chart on the box., 【What you get】: 1 x 120PCS Heat Shrink Butt Connectors with case ,1 x 280PCS Heat Shrink Tubing with case. Our 30 days no questions asked money back, worry free 18 month warranty and friendly customer service., 【High Quality】: Solder seal connectors heat shrink comply with relevant standards; Shrinking ratio: 2:1. Ideal used for Automotive, Marine and other Outdoor Applications., 【Insulation and Waterproof】: Polyolefin tubing in outside and hot melt rings in inside effectively improve waterproof performance to make sure the best result is insulated and sealed., 【Easy Operation】: No need to crimp, just strip your wires, insert them into the connector and apply heat. Specific color for Specific size, easy to pick up for use.