The AquaTop 6.5 Gallon High Clarity Glass Bookshelf Style Aquarium (HCA-6G) is constructed of low iron glass with a 91% light-through rate. The view from this 6-gallon high clarity cube is outstanding. There are no plastic frames to obstruct your view and each unit is has polished beveled edges for a higher aesthetic balance. High-grade German silicone bonds the cubes tightly yet matches the glass to give the cube a truly seamless appearance. Capacity: 6.5 Gallons. Hand-crafted, high clarity glass. Dimensions: 6.7" x 23.6" x 9.4". Glass Thickness: 5mm. Low iron glass with a 91% light-through rate. Polished beveled edges. High-grade German silicone for a seamless appearance. For both salt and freshwater systems.