Our arm rests are reproductions of vintage ones, suitable for most open back banjos. They are made to match an 11" rim, but can be carefully bent to fit other sizes (including banjo ukuleles and our mini five string model). Proudly made in the USA. Currently available in raw brass only. Please see the video below for installation instructions. If interested in placing a wholesale order, please contact us at info@thebeansprout.com.