Not all jumper wires are not made equal. You will find that female receptacles on 7" Schmartboard jumper wires are thinner than most on the market, which allow you to work better and easier in tight areas. Our Female receptacles fit snugly. We challenge you to compare ours head to head with others because we know you will immediately understand the difference. They are rated to handle the following specs: 28AWG, UL1007, 80 deg C, 300V.