Reversible Shelf with poop rail  fitted to both sides.
Once chewed on or for freshness the shelf can be turned over.
 
Comes complete with all fittings. 
 
Dimensions:
Large: 7.5 wide x 6 inch depth.
Medium: 5.5 wide x 5 inch depth.
Small :5 inch wide x 4 inch depth.

Made out of Kiln Dried Pine Wood.