Features: Protect your optical equipment with our Silicone Lens Dust Cover, to fit eyepieces with inner diameter of 42-45mm;objective lens with inner diameter of 61-63mm. Craft from durability silicone, these lens covers offer flexibility and a snugly fit, ensuring protections against dust and scratches for telescopes and microscopes. Suiatble for amateur astronomers, hobbyists, and professional who rely on precise opticals for their work or leisures activity. Perfect for use in laboratories, observatories, or even home, these covers keep your optical devices clean and ready for use at any time. Enhances the longevity of your valuable optical instrument with these easy to use and reliable lens protectors, accessories for anyone serious about maintaining their gear. Specifications: Component:Silicone 2option Type; Type1:Internal Diameter:Approx.42-45MM/1.65-1.77inch;Depth:Approx.1.3cm/0.51in, Total Length:Approx.14cm/5.51in Type 2:Internal Diameter:Approx.61-63MM/2.4-2.48inch;Depth:Approx.1cm/0.39in, Package Includes: 1pc Lens Cover note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.