Ultum Nature Systems rimless aquariums are a staple within the aquascaping community – Our tanks are designed using the golden ratio while keeping a minimalist appearance in mind, combined with the increased clarity of ultra clear glass, they are aesthetically pleasing in any room. Crafted with low iron 91% clarity glass and 45-degree corners – The glass appears clearer with a minimal greenish or blue tint with uninterrupted edges, providing a more true-to-life representation of your aquatic environment. Constructed with German made silicone – Bonded together using high quality adhesive rated for moisture and durability, our tanks give peace-of-mind for even the most dedicated aquarium enthusiasts. Leveling mat included – Leveling mats add a non-slip surface to the base of your tank and are a necessity for adding support and stability for keeping your tank safe and secure from shifting or slipping. 5N - 14.17" x 8.66" x 8.66"