Conwork 2-Pack Dual 4mm Banana Plug Jack Socket Binding Post for Speaker Amplifier Terminal Dual female banana socket plug. One end for 5mm male thread connector, other end for 4mm banana socket. Professional made with good performance Stable performance and easy to install 24k Gold plated. This connector is made by pure copper(Non-magnetic) Package Contents: 2 x Dual Female Banana Plug Terminal Binding Post. Lifetime Warranty.