No wood and no plastic - all metal construction. No assembly needed. Feeds 10-15 or more birds at once. More than 1000 feeding ports, plus two patented baffles. Rain or snow just blow or run right through. Wire mesh design helps protect wild birds from avian diseases. Holds approximately 2 pounds of nyjer (thistle) seed.. Dimensions are 6.2 X 6.3 X 16.3 UPC Code = 633686003401