Use this base to hold your feather flag on concrete or other hard surfaces.
Our sturdy Water Base weighs 40 lbs when full of water
Simply lock the connecting post and coupler ring to the water base.
Insert flagpole and twist coupler ring to tighten to fit the diameter of the pole.
Adapters are conveniently stored on the underside of the base.
https://www.featherflags.com/product/Water-Base-Flagpole-Holder–23878/