This 6 foot rectangular picnic table has plastisol top and seat planks made of plastic coated 3/4" expanded metal. The surface mount center post is made of 6" galvanized square tube and the heavy-duty seat arms are made of 3 1/2" pipe. The seat and top supports are made of 2 3/8" pipe. The In-ground post has 1/2" round head carriage bolts that hide the nuts making it tamper resistant. Plastisol picnic tables are made to withstand outdoor commercial use.