UniRac WEEB Grounding Lug by Wiley Electronics > 1 Unit
Manufacturer Part Number: 008002S
Order two grounding lugs for each rail splice plus one additional lug per rail. Grounding your solar panel system is absolutely necessary to prevent shock or fire hazard.
WEEB stands for "Washer, Electrical Equipment Bonding". The WEEB family of products are used to bond solar modules to solar mounts. The mounts are then grounded so the entire assembly is grounded.