Styrofoam hemispheres. Hollow Out Inside Styrofoam hemispheres. You can use the 2 pieces together to make a sphere, domed with hemisphere, or simply place something inside a cavity to use it like a duller. Due to the manufacturing method, there may be dents on the top part. ·Please note that the color of the product may appear different from the actual product depending on the monitor used. ·There may be cases where there are differences in items that are not available in handsfree stores. Please check with each store prior to handling instructions.