This adjustable deck support is designed to support a 10'' (25.4cm) deck with its 2725 lb capacity. It facilitates the leveling of the floor during construction or its adjustment following ground movements (freezing, thawing). It has adjustment degree of about 3" (7.62cm) high. This support can be easily installed in a deck-block or a concrete sonotube and it is completely reversible by tipping the base 180 degrees. To be used with 3 1/2'' square posts.It's black powder coated finish and its steel structure combine style and durability for years to come.