Internal Diameter: Adjustable 86-117mmAdjustable caliber for different caliber astronomical telescopes;Safe and fast to observe the ;long life useCautions:1. Don't use broken solar filter;2. Don't use poor-quality solar filter;3. Don't look directly at the ;4. Don't remove the Baader AstroSolar when observing the ;5. Never look at the , either directly or through telescopes, otherwise it will cause permanent damage to eyes if observing the without a professionally made protective solar filter installed that completely covers the front of the instrument.size:about 125x125x40mm Material:Plastic+PET+aluminum foil coatingcolour:BlackPackage Contents:1 x Solar filmOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.