Our CS team will answer all the emails from you,if you have any problem about our product or the purchased order,just feel free to contact us. Description: Brand new and high quality Screw connector fitting, no soldering needed Standard size fits most speaker 20pcs 4mm speaker connector (banana plugs) 10 red plugs and 10 black plugs The banana plugs will connect from 2mm up to 5mm diameter speaker wire Specifications: Dimension: approx. 9mm x 39mm Material: plastic & metal (gold plated) Applications: Primarily used to ensure a tighter connection of a speaker wire to the binding post in the back of the speaker or in the back of the audio receiver. Package included: 20 X Banana speaker plugs Note: 1.Please allow a little size error due to manual measurement. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different.