There are two kinds of test leads, one is banana plug to banana plug test lead, the other is banana plug to alligator clip test lead . test leads are made of high quality PVC material. it can help with and easy of use. test leads are soft and to high and low temperature. Banana plug is made of nickel plated. it is retractable safety banana plug. high quality, strong electrical conductivity, firm and difficult to bend and deform. The alligator clip is firmly attached to the wire, and rubber insulation ensures it 't slip off during use. The spring on the alligator clip is strong enough that it 't warp as you use it regularly. These jumper wires are useful for a variety of electrical or electrical work .A good choice for technicians. These banana plugs can be widely applied for electrical maintenance,Automatic electrical equipment, House decoration,auto car repairing, school physics teaching,prototyping or diagnosing problems in laboratory. Colour:Black & Red Material:Metal+Plastic Package Contents: 2 * test lead cable 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.