Biltwell Inc. Murdock Black 4" Risers MR-004-HD-BK Investment-cast steel one-piece top clamp and threaded lower mounting bungs TIG welded 0.120in. wall 4130 chromoly steel uprights 6-inch, 8-inch and 10-inch rises available Satin black electroplated or polished show chrome 1/2in.-13 threaded holes on mounting base accept stock H-D hardware