FEATURES: Excellent conductivity and resistance adequate solder around the wire, melt and flow until form seal on the wire Solder Seal make the connector not split when crimped, and the wire not pull out Finish your job or project with the right butt connectors Compatible with AC and DC current Type: 22-18 AWG Operating temperature: from -67℉ to 266℉ ( -55℃ to 130℃ ) Start shrink temperature: 80℃/176°F Fully shrink temperature: 130°C/266°F Step1: Strip wire insulation insert into electrical wire terminals crimp connectors splice . Step2: Use wire crimper crimp connector and wire. Step3: Apply heat with a heat or a mini blow torch while rotating a terminal. Heat shrink wire connector tubing reduce in size and adhere to the wire. No need soldering set. Safe and connection finish quickly. Suitable for working on boat , motorcycle, automotive, vehicle, laboratory, home Excellent conductivity and resistanceretch and mechanical damage Material: PE colour: red Package Contents: 2400 x Solder Seal Wire Connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.