- Heavy thickness(0.23mm-0.28mm) - 75 sheets per box - Award winning premium Dental Dam - Health Canada, CE and FDA approved - Polyisoprene (Latex Free) ISODAM ™ material - 125mm (5” x 5”) and 150mm (6” x 6”) sizes available - Medium or Heavy duty thicknesses - Specially designed for patient comfort - 75/box