Alligator clips are made of high quality material. Rating: CAT III 1000V 32A. The alligator clip has a built-in strong spring. Stronger grip and conductivity. The maximum opening can reach 20mm, and there's no deformation after multiple use. Safe and reliable: The alligator clamp of the electrical jumper has a fully insulated PVC sheath, and the alligator clamp has a built-in strong spring. Better grip and conductivity. The wiring is convenient, simple and fast. Widely used: Compatible with 4mm standard banana plug. Widely used in electrical engineering and voltage tester, battery fast connection. Package Include: 10Pcs Full Insulated Crocodile Clips (5 x Red + 5 x Black) Product Name:Insulation Safety Test Alligator Clips Operating Temperature:-40℃-+120℃ Connector:Compatible 4mm Banana Plug Rated Current:32A (max) Maximum Voltage:1000V Colour:Red-Black Material:Plastic Package Contents: 10 * Alligator Clips 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.