Test leads are made of silicone material. Silicone can help with and easy of use. Silicone leads are soft and to high and low temperature. Alligator clips are made of pure copper material, which has stronger conductivity and better performance than traditional. The insulating plastic protective covers are tightly attached to the crocodile clips. Covers 't slide and fall off during testing and cause an accident, which protects your safety to the greatest extent. The other end of the test wires is male for breadboard projects, which is pure copper insulated for smooth conductivity. Suitable for connecting a wire to breadboard from power supplies, LED strips, multi-meters and . Suitable for electrical and electronic testing. They're also suitable for , for , for , wearable circuit projects or a breadboard experiment. Package include: 10PCS Alligator clips to Breadboard Male Jumper Wires 5 colors. Length: about 30cm. 5 colors help you distinguish them well when doing testing. Color:As Shown Material:Silicone Package Contents: 10 * Silicone Test Leads 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.