I am somewhat disappointed in the quality of the InstallGear 10 Gauge AWG Tinned Pure Copper Lugs Ring Terminals Connectors with Heat Shrink that I received. They appear to be of lesser quality than other 10 gauge copper lugs that I have been using in my solar system. The weight of each lug is noticeably less than the weight of other lugs, which causes me to be concerned about the overall quality and durability.