Accurate reproductions of the Original Equipment parts used to mount the Flatside gas tanks on 4 Speed FX models from 1985 thru 1986, and all Softail models 1984-2017. Also for many Custom applications as these rubbers feature a 1/2" (12.7mm) long steel insert that take M8, 5/8" UNC and UNF screws in 0.825" (21mm) holes in up to 1/4" (6.4mm) thick material.