Review on 🔒 Waterproof Adjustable Protectors with Conextlink Firewall Function by Ryan Saxton

I'm doing some 2/0 runs of wire from the alternator to the batteries, 4 runs. I had to drill a 1 1/4 inch diameter hole to use this item. Make sure the surface is flat or you won't get a strong seal. Also attach them before threading the wire. It is difficult to tighten the nut on the firewall with the wire pulled through. I would buy again if I need more. They are larger than other 1/0 firewall stubs.