its made from an expanding foam that wont leach in to the water. it was made using a mold from the amazon somewhere and theyve been making these ever since. you dont see them very much as they are incredibly overpriced. the company is called "back to nature"
when you fit the backing its suppoesed to be siliconed in position and then a hole is drilled for the water to circulate around the tank. i bypassed this myslef so that i could take it out at any time to clean in and around it. i was also worried about fish getting in behind there and not being able to retrieve them. it is flawed in some respects but it just looks so damn cool. as for a website the companys name is "back to nature" thats all i can tell you