Features: 1.Made of high quality acrylic material, sturdy and durable for long time use. 2.Available for all kinds of open fish tank/pet box without tension and need to be covered. 3.Can be hung directly on the edge of the tank, bracket can be placed on the lamp frame, filter, tank cover and other equipment. 4.Compact size, easy to install and use. 5.Wonderful accessory for aquarium, fish tank. High transparency, more beautiful. Specifications: Item type: Aquarium Glass Cover Holder Material: Acrylic Color: transparent Suitable scope: aquarium, fish tank, grass aquariums, etc. Type 5mm width: Approx. 38mm/1.5in, can be clamped glass thickness under 5mm; Type 6mm width: Approx. 55mm/2.2in,can be clamped glass thickness under 6mm; Type 8mm width: Approx. 55mm/2.2in can be clamped glass thickness under 8mm; Type 10mm width: Approx. 55mm/2.2in, can be clamped glass thickness under 10mm; Type 12mm width: Approx. 55mm/ 2.2in, can be clamped glass thickness under 12mm; USES: used for all kinds of open fish tank, grass tank, and need heat preservation turtle snake tank pet glass tank, also can be used to support the filter tank. Recommendations: less than 40cm fish tank with four, large fish tank to use more than six. Packing List: 20 x Aquarium Glass Cover Holder