Size: 5.5X2.1mm DC Jack with 11.5mm Panel Mounting Hole Diameter, Rating: 2A 12V DC | Feature: Plastic Material with Hex Nut, 3 pin solder Terminals | Function: 2.1mm DC Jack can be used under 6V 9V 12V 24V DC Power | Application: 2.1mm Female DC Power Jack Suitable for Guitar Effect Pedal, Media Player, MP3/MP4 Player, AV Equipment, Car Audio, and etc. | Package includes: 30pcs 2.1 x 5.5mm DC Barrel Jacks with Hex Nut, Red White Black 10pcs each.