About 2.75#. I would have used 1/2" lighter weight rubber material if I did over again. This 3/4" stable mat is what I had around. High density EVA material would be lighter.... or, what is that material that you use? If you'd like one, send me a piece and I'll see how well it routes. Make it 7"x10 11/16". Also, if and when I do the tank and pump addition, I'd be cutting out more of the material to recess these to key into place.