Product Description Material: Plastic Size: 15 * 5.5 * 4cm (mobile phone and telescope without main picture) Color: Black Caliber: 38-43 mm Flat circle of M circle: 34-38.5 mm (for 32-50 mm telescope) S-circle: 31-34mm (suitable for astronomical and small aperture telescopes) Two circles superimposed: 26-28mm (for microscope and astronomy) Quantity: 1 piece Package Contents: 1 Universal Universal Telescope Mount 1. Setup Easily align the eyepiece with the phone camera. It only takes less than 1 minute to connect the phone to the optical instrument and get a clear picture. It's an absolute time saver and image grabber. 2. Fits all kinds of eyepieces Universal Phone Adapter Bracket Fits eyepieces with aperture outer diameter: 38-43 mm, can be mounted on most binoculars, spotting scopes, telescopes and spotting scopes, microscopes. 3. Compatible with most mobile phone universal adapter brackets, suitable for mobile phones of various widths. Not only for smartphone models Commonly used in iPhone, Samsung, LG, Sony, etc. 4. Unique Design The phone stand is designed to be rotatable and removable, avoiding pressing the volume key and power key during use. It also makes it easier to align your phone with the adapter and you can focus as quickly as possible. 5. Compact and high quality material full size 15*5.5*4cm. It is lightweight and compact for easy transport and storage. This phone adapter is made of soft but durable rubber and EVA. The purpose is to secure your phone and prevent it from being scratched. WUZHOU