I made this out of The brute because its a nice solid thick rubber that can handle the heat pad and normal wear and tear. The opening is made of PVC lattice trim from home depot. I put 3 layers of screen in the door for strength.
And 6 screws through the lid to keep it on secure and no snake will be able to push through it. All thats left to build is a stand. The entire project cost me 50 bucks. Now i just need to build 2 more.
I am making these for my redtailed boas.