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Boyd Flotation Free Flow Waterbed Tubes fit inside a 4″ shallow fill softside waterbed mattress. A tube-filled waterbed mattress allows you to independently adjust the level of support, from plush to firm, on each side of the bed.
Each Free Flow Waterbed Tube comes with one (1) waterbed conditioner tablet already pre-placed inside each tube. We recommend that you add replacement waterbed conditioner tablets once per year.