Bullet Point:
Length: 15''/38.1cm.
Heavy duty 4 gauge black cables.
All copper conductor.
Flexible enough for your application.
The ring size is 3/8'' stud.

Copper conductor for maximum conductivity.
Optimized internal construction offers increased durability.
Corrosion-resistant terminals 100%.
Flexible PVC insulation.
Recommended for engine to ground connections .

All copper gives you better conductivity compared to other mmaterials.

Both ends have a metal eye that attach to any batteries you are using and the object you want to power.
It offers a reliable and secure connection.

Nice and safety
Dimensions: 7.3 x 2.5 x 0.9 inches.
Unit Weight: 0.8 ounces.