made of steel and treated wood. Very tough and well built. easy to modify and attach to any small pickup. dimensions: 62 " wide x 74" long x 36" tall. Was installed on a 1983 toyota 4x4 short bed truck. would most likely drop onto and toyota shortbed up to the 90s with very little modification. I am restoring my truck back to stock box and have no need for the flatdeck. $350.00 obo need out of yard soon.