materials:Our 4-pole wire connector kit is made of brass, which has strong conductivity, good thermal stability, , oxidation and resistance, and long-lasting performance. Applicable wires:These connectors are suitable for connecting 7 AWG and thinner wires, with a rated current of up to 80A, providing reliable performance for high-power applications. Product size:The length of this brass connector is 1 inch, with an inner diameter of 0.21 inches and an outer diameter of 0.35 inches. The rated current is up to 80A, providing a reliable connection solution for high-power electrical systems. Wide Application: Our terminals are suitable for a wide range of applications including ships, automobiles, electrical, and electronic industries, providing flexibility for various projects Color: As Shown Material: Metal Package Contents: 1 set Wire Connector Nut Kit 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.