These are portable barriers made from metal bars. Common throughout the world, they are mainly used for crowdcontrol. They are 30 mm high and 66 mm wide.

Available in a set of 15 that, put together, make about 1 meter of barrier and a set of 30 that make about 2 meter of barrier.

Also available in 72nd scale in a set of 35 that make about 1 meter of barrier.
These are computer generated pictures from the designsoftware.
The red part is a frame that will protect the barriers during shipping.