50 Test leader & 5 colors: green×10,white×10,black×10,yellow×10,red×10 100 Clips by nickel plated steel with PVC insulators and vinyl-covered alligator clips, strong spring clips and easy installation Length-20.5', Test lead-1.6' The clips soldered and stamping to the wires, Alligator clips securely to ensure good conduction Wire: 22-AWG copper with PVC insulation, The test leads are handy for most light electronics works Perfect for electrical testing such as experiments, breadboarding. Widely used in laboratories, shops, schools, home and industry. High-quality product, 12 months manufacturer warranty and 24/7 hours customer service