For those who are asking about my snake racks .It's cheaper to make your own just get some basic melamine and some heat tape and aluminum foil and edging tape and a clothes iron to apply it and then wire your heat tape and get a pair of vice grips or pliers and crimp the clamps to the heat tape hard to get a good connection and tape it down to each shelf with aluminum tape and clean up your wires for each level by making them short.