Based on our own experience, these connectors have been a game changer in our industrial electrical projects.They are not only waterproof, but also insulated and automotive-grade ensuring durability and longevity. The installation is a breeze, with the transparent casing allowing for easy inspection of the wire CONNECTION. The only con we found is the price, which is slightly higher than other options in the market. Overall, we highly recommend these connectors for any industrial and scientific wiring and connecting needs..