Safely watch the sun with these CE & ISO certified solar eclipse viewers. The lenses are made of a special black polymer that blocks all harmful UV and IR rays, so you can safely watch the sun without damaging your eyes. The viewers come with an observation card that is approximately 2.5x10 cm in size and provides a sturdy base for the viewer. The sun will appear in a natural orange color when seen through the filter. These viewers are perfect for viewing solar eclipses, large solar spots, and Venus/Mercury transits. Order your pack of 25 solar eclipse viewers today and be ready to safely watch the next solar eclipse!