Freeze Point Rinks Perimeter Boards and Hockey Boards are pre-manufactured in 8ft (2.439 m) sections. They are constructed of the heaviest-duty aluminum custom extruded tubular frame, with a wall thickness of 0.19 inch (4.75 mm), the thickest frame walls in the rink industry! The Board Frames are clad with 1/2 inch (12.7 mm) white polyethylene, with your choice of colors for the kickplate and the top rail. The boards are available with or without spectator shielding (tempered glass, safety tempered glass, and plexiglass).