I paid much less than the current price. There are many types, if you don't need to connect 5 wires, take a smaller one. This was done for a box next to the main panel so that all the common elements are united: grid, grid disconnector, inverter, main panel and auxiliary panel. The double entry is a plus if one of your cables is short and needs to be returned. A metal-to-metal connection can be a little more difficult to secure as it can go through the crimp. The included dielectric grease is…