Amtra aquarium mat. This Amtra aquarium mat is a safety mat for fully glass aquariums. It is made of black synthetic rubber with a material thickness of 4 mm. The aquarium mat compensates for small unevenness and protects the aquarium from potential damage. Even small water splashes are absorbed by the mat, thus protecting your aquarium stand as well. Available in 4 sizes: 60x30 cm, 80x35 cm, 100x50 cm, 120x50 cm.