2" x 4" black rubber feet feel like semi-rigid plastic, not rubber that will give slightly. The lower parts seem too small, but there isn't much choice. It works, but I would use it with more caution; Don't rely on those legs too much. Certainly not on the slightest wet surface, and no possibility of slipping back. There is a one page guide with very clear illustrations for installation. However, even if the ladder itself is heavy; I would recommend not overloading those "legs".
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