Squirrel House/Nest. Designed to be mounted on a tree or wall, brackets shown are an indicative suggestion for mounting the nest. The squirrels in some images are for an indication of scale. The jar shown is a mason jar you can buy in most supermarkets or home stores its size is 1.9L or 64.25oz., Its opening diameter is 4.5" or 114mm but this can be adjusted to suit a smaller jar if prefered. Plywood construction would be reccomended, however it would be interesting to see this constructed with 3D printed parts.