Hill Country Customs Stock Style Satin Black 3" Round Mirror for Harley-Davidson Models Satin Black Metal 3" Round Mirror. Similar Style to stock round 3" mirrors on Harley-Davidson models. Stem length is 3 3/4" long, stem height including threads is 2 3/4" tall. 5/16"x 24 thread mounting nuts and washers are included. Fits on either side of the handlebar.