Features: Protect your telescopes clarities and performances with our durable metal Astronomy Telescope Lens Dust Caps, a great accessories for every astronomy enthusiasts. Crafts from quality aluminum, this dust caps comes in M42/M48/M54x0.75mm thread size, ensuring a great fit to various telescope lens while preventing dust accumulations. Great for amateur astronomers and professiional skywatchers alike, this dust caps is great to protect your telescope lens against environmental contaminants. Whether you're setting up your telescope on home or transporting it to a remote star party, our dust caps provide the protective need to maintain optimals viewing conditions. Enhances the longevities of your telescope investment with this black dust caps that blend functionality with a aesthetic appeal, making it a subtle yet essential addition to your astronomy gear. Specifications: Component: Aluminum Color: Black Optional Diameter: 42mm/4.65in; 48mm/1.88in; 54mm/2.12in Quantity: 1pc Package Includes: 1pc Dust Cover note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.