The Gardner TPI Lite Boards come in dimensions of 2ft x 4ft and are offered in two thicknesses, 3.5mm and 4.5mm. They are designed to minimize wastage in room ceiling construction by minimizing cuts and wastage that usually occur with 4ft x 8ft boards. GARDNER TPI Lite Boards are the perfect partner to GARDNER TPI Ceiling Boards and are an excellent choice for contractors looking to economize and save time and money during their ceiling construction projects. GARDNER TPI Lite Boards are ideal for interior and exterior ceilings.