Wire Terminals & Connectors features: All terminals and connectors are constructed of copper, and are electro tin-plated to ensure maximum electrical conductivity after crimping. Insulation sleeve provides good dielectric strength and withstands the pressure of crimping. Strip wire insulation, crimp connector barrel with a wire crimper. Feature Color: As shown Size: 20.00X13.00X3.80cm/7.86X5.11X1.49 inch Material: Copper Various Connectors: Package comes with 540 insulated terminals and connectors in the most commonly used sizes Used For Electrical Repair A handy assortment of terminals and connectors included for quick electrical repairs Copper cable lugs are applicable to the connection of copper or Aluminium core cable and electronic apparatus. The products adopt friction welding workmanshlp. The lugs have the characteristics such as high weld strength, long life and so on. Insulation sleeve has good flexibility and good insulation effect. Specification 6.3 Type: Inner diameter: 6.3mm, thickness: 0.4mm(male), 0.8mm(female), compatible wire:0.75-2.5mm(AWG 18-14) 4.8 Type: Inner diameter: 4.8mm, thickness:0.35mm(male), 0.5mm(female), compatible wire:0.75-2.5mm(AWG 18-14) 2.8 Type: Inner diameter: 2.8mm, thickness:0.25mm(male), 0.5mm(female), compatible wire:0.5-1.5mm(AWG 22-16)