Connector consists of a metal splice (which can be a crimped or soldered section) encased in a heat-shrinkable tubing. The metal part is where the wires are joined, while the heat-shrink tubing provides insulation and protection.
Commonly used in automotive, marine and electrical wiring projects where reliability and resistance to environmental factors are important. The heat shrink tubing provides a protective barrier against moisture, dust, and mechanical abrasion, which helps to prevent corrosion and damage.
The connector offers electrical insulation, reducing the risk of short circuits of electrical leckage.