Your are looking at a set of dock wall gates and walls. 6 Separate wall sections so you can position them how you want, plus 2 doors to slot in and are movable as shown.
The doors open and would be perfect for a river scene or lock widebeam lock canal scene for your wargaming or diorama.
Dimensions as set up in the pictures: 30cm Length x 12cm Width x 2.5cm Height