Material: Plastic Size: 15 * 5.5 * 4cm Color: Black Caliber: 38-43 mm Flat circle of the M circle: 34-38.5 mm (for 32-50 mm telescope) S-circle curve circle: 31-34 mm (applies to astronomy and telescopes with small openings) Two circles superimposed: 26-28mm (suitable for microscope and astronomy) Quantity: 1 piece Package Contents: 1 x Universal Telescope Bracket 1. Easily align the eyepiece with your phone camera. It takes less than 1 minute to connect the phone to the optical instrument and capture clear images. This saves time and helps capture sharp photos. 2. Compatible with a wide range of eyepieces. The universal phone adapter fits eyepieces with an outer diameter of 38-43 mm and works with most binoculars, monoculars, telescopes, spotting scopes, and microscopes. 3. Fits most smartphones. The adapter accommodates various phone sizes and is compatible with popular models including , , LG, and devices. 4. Features a unique rotatable and adjustable design. The phone holder can be positioned to avoid pressing volume or power buttons, allowing quick alignment and focus. 5. Compact and made from high-quality materials. Measuring 15 x 5.5 x 4 cm, it is lightweight and easy to carry. Constructed with soft yet durable rubber and EVA material to securely hold your phone and protect it from scratches.