The KELVIN® Long Island Structure Tester can be used to test Bridges, Towers and Booms. It complies with the specs set forth by the Science Olympiads. Includes frame, bridge support, boom testing system, bucket, hook attachments and instructions. Also comes with a class pack of Balsa Wood Bridge/Tower Parts and Glue, Enough for 24 Students. The unit is solidly welded and shipped for easy assembly. While supplies last.