These chainlink backstops are made from factory prefabricated panels. Each 5 ft. by 10 ft. section is made of 1-5/16 in. OD (Outside Diameter) galvanized tubing with center reinforcing brace and 9 gauge galvanized woven wire that is stretched and fastened on all sides with 3/8 in. rods and steel clamps. The side wings are bolted at a 45¼ angle to 2-3/8 in. OD pipe frames.