Review on Complete Heat Shrink Wire Connector Kit For Marine And Automotive Use - TICONN Blue And Red 200PCS Insulated And Waterproof Terminals by Sameer Harder

These are good. They compare with more expensive domestic options. Inner barrels are well made so the wire doesn't snag on the way in. When you crimp them, they stay crimped. They shrank down tight enough against the matching sized wire jacket well enough for me to trust outside. For severe service (boat trailer, etc) I would put a layer of shrink tube over the butt connector anyway. But these could stand alone in a lot of applications with their own extended outer tube shrinking. Glad I got these. they have already been very handy.