HAVIS's C-HDM-106 heavy duty vehicle specific side mount for the 1997 – 2019 E-150, 250, 350 and 450 E-series vans. It mounts to the inboard side (side seat bolts) of the passenger seat. The side mount measures 7 in out from side of seat. It works with C-HDM-200 series telescoping poles for easy installation (sold separately).