This is for connecting a new radio to a new power supply - I didn't want to cut the car cigar lighter adapter that came with it. more than enough thickness for the expected power consumption and with thick insulation. In fact, I was pleasantly surprised by the weight of the wires, I was expecting less. Two fuses, one on each side. Standard T-connector. This type of part is simple and could be assembled at home if the parts were available or if more than one was needed. But I don't have the parts right now, so this was the most convenient and economical way to get a disposable power cord.