Operating temperature range:Operating temperature: -55C to 125C (-67F to 256F) Minimum shrink temperature: 80C (176F) Minimum temperature for solder to melt: 138C (280.4F) Size: Red connector: 22-18AWG, cable -section 0.5 to 1.0 mm Blue connector: 16-14AWG, cable -section 1.5-2.5 mm White connector: 26-24AWG, cable -section 0.25-0.34 mm Yellow connector: 12-10AWG, cable -section 4.0-6.0 mm Black connector: . 3.0X20 mm in length How to use: 1. Strip the 2 wires that going to connect and select the right size of connector. 2. Thread the connector to one of the wires and then twist the 2 conductors . 3. Move the connector to the middle of the conductor. 4. Apply heat to the connector slowly and evenly with a hot air with nozzle until it melt with the wire. Colour:As Shown Material:PE+tin ring Package Contents: 60 x Red connector 60 x Blue connector 50 x White connector 25 x Yellow connector 405 x Black 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.