Wooden cedar blocks are natural moth repellent due to the unique smell of cedar wood. Chemical substances such as naphthalene harm your health. Cedar wood blocks are human and environmentally friendly - a natural alternative to naphthalene. Put a few in your drawers and cabinets. As the odor decreases, you can activate its odor by sanding it or brushing it with a hard bristle brush. You can use it for many years. You can access our other model - moth repellent cedar blocks from the link. DIMENSIONS ARE 2X2X2 CM