These are the most pathetic excuse for jumpers I've ever seen. They look like something produced in a slave labor camp. The wire MIGHT be 28 ga. and isn't very well connected to the alligator clips. I only bought these to get my order over $25 so I could get free shipping. Since they have almost no value, that means I paid $3.67 for shipping. Could have been worse. At least I can salvage the alligator clips and MAKE MY OWN jumpers. If you need a good laugh, buy these.