09JulJuly 9, 2019 Adjustable collar Larsens Inc2023-11-14T15:59:18-08:00 A Adjustable Collars, Frame, Frames, Half Height Skirts, Pole Like: 0 Half height (privacy) poles typically come with adjustable collars. This allows the horizontal pole to be raised or lowered depending on the set up surface. This pole is used to hang half height skirts or to act as a sill for zip down windows.