Amtra Aquarium Mat. This Amtra aquarium mat is a safety mat for fully glass aquariums. It is made of black synthetic foam rubber with a material thickness of 4 mm. The aquarium mat compensates for small unevenness and protects the aquarium from potential damage. It also absorbs small water splashes, thereby protecting your aquarium furniture. Available in 4 sizes: 60x30 cm, 80x35 cm, 100x50 cm, 120x50 cm.