• Edge cable lugs are made of pure copper with strong durability ,99.9% purple copper structure achieved excellent conductivity. 
• This copper ring terminal kit come with dual wall adhesive heat shrink tubing (4 red+ 4 black), good insulation and sealing to extend the service life.
• These 4AWG wire lug kits are widely used for household appliances, power distribution cabinets, automobiles, electrical industry, mechanical equipment.
• Package Includes 8pcs 4AWG 3/8” and 4AWG 5/16” Copper Ring Terminal, 8pcs Heat Shrink Tubing.