This CPR Aquatic Surface Viewer provides hobbyists with a more "natural" view of their tank inhabitants from the surface of the aquarium. This handy viewer can also be used in tide pools or any other body of water. By smoothing out the ripples along the water surface, users get a clear picture of what's below. Great for helping capture detailed photos of corals and fishes from above. Hand crafted in the USA with cell-cast acrylic. Dimensions 8"L x 8"W x 4"H.