A simple 6.35mm ( 1⁄4 inch) cap designed to keep my mixer dust free. You can use it on any other audio device, guitar amp, etc, just make sure it has enough room around the connector for you to put your finger and pull it out! No brim or supports required, easy and fast to print. There's a file with a clean face for you to customize, another with a lightning bolt on it and the last one is a batch of 10 already lined up for printing.