Car Audio Lugs are made from 99.9% pure annealed copper, providing a high degree of conductivity for maximum current flow. This particular variant is suitable for use with 4 Gauge Battery Cable & 5/16" (M8) Stud.
https://selterm.com/collection....s/car-audio-battery-

Marine Battery Lugs are made from 99.9% pure annealed tinned copper, providing a high degree of conductivity for maximum current flow. This particular variant is generally suitable for use with 8 Gauge Battery Cable & 1/4" (M6) Stud.
https://selterm.com/collection....s/marine-battery-cab

Organize and protect your cables with this versatile heat shrink tubing kit. Contains a range of shrink tubes for automotive, DIY, and electronic applications. Durable, flexible, and heat-resistant!
https://selterm.com/products/h....eat-shrink-tubing-ki

2 AWG Lugs are made from 99.9% pure annealed copper, providing a high degree of conductivity for maximum current flow. This particular variant is suitable for use with 2 Gauge Battery Cable & 1/4" (M6) Stud.
https://selterm.com/collection....s/2-awg-bare-copper-

1 Gauge Wire Lugs are made from 99.9% pure annealed copper, providing a high degree of conductivity for maximum current flow. This particular variant is suitable for use with 1 Gauge Battery Cable & #10 (M5) Stud.
https://selterm.com/collection....s/1-awg-bare-copper-