This wire connector nut is made of thickened copper material, with pickled surface, which has strong conductivity, strong heat dissipation, good stability, and anti-oxidation. Our circuit wire connecting terminal is widely used for household appliances, automobiles, electric power industry, mechanical equipment, distribution cabinets, etc. The 80A-round wire connector nut inner diameter is 0.2inch, length 0.78 inches, wiring range 2.5-10mm². /The 60A-square wire connector nut inner diameter is 0.26 inches, length 0.88 inches, wiring range 1-16mm². The package includes 10pcs 6-gauge wire connector copper connecting terminals, 10 heat shrink tubes and 1 wrench. It is easier to connect wires and install them in one piece. This wire connector nut kit makes it easy to connect wires and install them in one piece. It is made from thickened copper material, which has strong conductivity, strong heat dissipation, and good stability. Stability: Our circuit wire connecting terminal has good stability and anti-oxidation, which can be used for connecting wires and install them in one piece. Waterproof: This wire connector nut is waterproof and can quick wiring connection. It can be used for home appliances, automotive, electric power industry, mechanical equipment and more. Product Name: Wire Connector Nut Kit Style : 80A-Round/ 60A-Square Product Size: 80A-Round: 9x19.8mm; Inner diameter: 5.2mm; Screw specification M4 60A-Square: 22.3x8x7.9mm; Inner diameter: 6.5mm; Screw specification M6 Colour:As Shown Material:brass Package Contents: 1 set x wire connectors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.