Stackhouse has revolutionized the board system by adding a top 1/2" layer of bright white high-density polyurethane that is attached to a 2" x 8" plastic lumber underboard. This gives you the best of both worlds. The high-density polyurethane gives not only excellent rebound for the jumper but also holds up to the wear and tear of track spikes. Attached to the plastic underboard it sits firmly in the zinc plated steel tray system and is mounted to a steel frame work with 6 adjusting bolts for fine tuning the board to perfectly level. The heavy-duty bright silver zinc plated tray not only holds up to the weather but also has drain holes for easy drainage. Foul board is made of 3/4" plywood and can easily be taken out and plasticine put in for meets. Cover is made of heavy-duty steel.