FEATURES: Excellent conductivity and corrosion resistance adequate solder around the wire, melt and flow until form seal on the wire Solder Seal make the connector will not split when crimped, and the wire will not pull out Finish your job or project with the right butt connectors Compatible with AC and DC current Type: 12-10 AWG Operating temperature: from -67 to 266 ( -55 to 130 ) Start shrink temperature: 80/176F Fully shrink temperature: 130C/266F Step1: Strip wire insulation insert into electrical wire terminals crimp connectors splice barrel. 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 tubing will reduce in size and adhere to the wire. No need soldering set. Safe and durable connection finish quickly. Suitable for working on boat , motorcycle, automotive, vehicle, laboratory, home Excellent conductivity and corrosion resistanceretch and mechanical damage Material: PE colour: yellow Package Contents: 800 x Solder Seal 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.