Unique Design: : Female Banana Plug Terminal Binding Post.Wide Application: : This binding post is widely used in various types of industrial control equipment. It is a great replacement for electrical projects such as speakers, battery boxes, and subwoofer.Tips: : Please confirm if the size meets your requirement before purchasing.Perfect Size: : Screw Diameter: M6, Suitable for: 4mm Banana Socket, Total Size: 21 x 10mm / 0.83" x 0.4" (L*D), Main Material: Brass, Nickel Plated, Plastic; Color: Red + Black, Package Content: 5 Pairs x Binding PostGood Feature: : 1. Made of plastic and metal, the spring terminal is durable, and provides a long service life.2. You can replace the screw-down type with this connector and it will fit the existing terminal cup.