DOCK BLOCKS Floating Dock Patented connecting system and High-Density Polyethylene (HDPE) material makes it so strong it includes a lifetime warranty Customizable shape that is easy to reconfigure Each individual block is 2.56 sq/ft, weighs 15lbs, & can support 200lbs Fast & easy to assemble for DIYers Ships within continental United States. Does not ship to HI or AK.