There are many manufacturers of rack systems. What are you looking for? How many tubs, material (metal or plastic), type of heating? ARS and freedom breeder are the top end professional racks. There are many companies that make high quality PVC racks, google PVC racks and a lot will come up. There is always an option of making your own rack, they can be pretty easy to make with the right tools. There are a few threads about making your own rack.

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