Review on 💧 Waterproof Automotive Electrical Connectors by XUUAP: Ensure Reliable and Durable Connections by Ben Balas

Not sure what stretch is for product rating. They are great for 14-16 gauge wire. I used a grill lighter. Sea wire has high temperature resistance, so there were no consequences. When I tried 12Gage wires. the solder did not penetrate and the additional heating time caused the product to fail. Just don't try to use outside of the specified size range. This is a time saver, no crimping, both wires are connected at the same time, a secure tight connection (visible solder flow), then both ends are sealed with heat shrink tubing. Saves like 4 steps and multiple tools. Suggest covering the ends of the wires in the connector.