The Ilsco SGB-4 grounding lugs are made with industrial strength 6061-T6 aluminum alloy, and are electro-tin plated. They come with stainless steel hardware and screws. They can be mounted to 1/4" PV panel frames and are installed without drilling any holes for ease of installation. They can be used with copper or aluminum and are rated for grounding and bonding only.
The SGB-4 lugs are engineered to withstand corrosion and harsh weather environments, including marine like environments with lots of moisture and fog. The Ilsco SGB-4 grounding lugs are UL 667P listed and are compliant with all NEC requirements for roof and ground mounted photovoltaic systems.