Musiclily Acoustic Electric Guitar Stereo Flush Endpin Cylinder Output End Pin Plugs Strap Button Jack,Black For acoustic electric guitar jack replacement. Material: alloy ; Color: Black 1/4"(6.35MM) stereo phone jacks work with standard amp cords Strap button feature gives handy place to attach a guitar strap;Great as output jacks on guitars and other instruments Pacakage includes : 1pc jack