CA-50 - Hand-Held Black Polymer Film Solar Filter Viewer Cards (One pack of 50 each) Dimensions: 3" X 5" (76mm x 125mm) Black polymer is the most common filtering material for observing the sun through telescopes and binoculars and with the naked eye Solar image is yellow-orange; Made in USA The viewers are light weight for portability and made of sturdy paperboard; (They do not include a storage case) Safely view the sun anytime and during all partial phases of an eclipse