D150F750 spherical primary mirror with a diameter of 150mm for enhanced light gathering and clarity in astronomical observations. Includes a 35mm elliptical secondary mirror, devised for optimal reflection and durability with aluminum plating and protective film. Lightweight devise at approximately 800g, making it easy to integrate into your DIY telescope projects without adding unnecessary weight. Perfect for astronomy enthusiasts and DIY telescope builders looking to upgrade their equipment with reliable and efficient components. Package includes 1PCS of the primary mirror and secondary mirror, providing everything you need to enhance your telescope setup.