Features: Elevates your stargazes experience with this comprehensive set of 8 telescope extenders, engineered to fit standard 2inch M48 0.75 thread mounts for seamlessly compatibilities. Crafts from quality alloy using advanced technology, these extenders feature internal antireflective threading to enhances your viewing clarities and prevent light loss. Great for astronomical enthusiasts and amateur stargazers alike, this set caters to both professtional astronomers and those just starting their astronomical journey. Whether you're observing the night from your backyard or taking a deep diving into universe at a remote dark site, these extenders offer multiple lengths ranging from 3mm to 30mm to suit any observational need. Expand your telescope's potential and customizing your astronomical observations with this essential accessories kits, ensuring that every star night is capturing in perfect detail. Specifications: Component: Metal Alloy Color: Black Size: As pictures shown. Thread: M48x0.75mm Extension Tube Height: 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm, 30mm Quantity: 1 set Package Includes: 1 Set Extension Tube note: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. Due to the differences between different monitors, the picture may not reflect the actual color the item.