They are 4″ square, made from 11 gauge steel, and Grey powder coated. They have hand-holes and hand-hole covers. Length 20ft. Bolt Circle: 8-9″. Base Plates: Slotted base plates 36,000 p.s.i. Anchor Bolt: 3/4″ x 17″ x 3″ Galvanized anchor bolts and galvanized hardware.