Full Aperture Glass Solar Filter – This is right off the web-site: “Designed to fit snugly over the aperture of your telescope, these optical glass filters block 99.9% of incoming sunlight, allowing you to safely observe sunspots and solar granulation in the sun's photosphere, and in the sun's natural color. The glass elements are machine-polished and triple-coated with nickel-chromium stainless steel for a scratch-resistant surface. Each filter is mounted in an aluminum cell and supplied with foam tape liner to accommodate slight variations in size”.
There are a few small pinholes (they tell me it's somewhat common) that have been covered with a felt marker (as mentioned in the directions). Otherwise the glass is very clean. I used this extensively with my scope with no problems and the views are great! $35.00 shipped in CONUS. (Warning!!! Use this product at your own risk - if not used properly - you can damage your eye site) PayPal OK