Check the listing for details. 2 inch Telescope Eyepiece T Adapter to M48x0.75mm Thread SLR Camera Filter Ring. Color: Black, Condition: New. Listed at 9.99 USD. Product Description: This Visual Back is a metal adapter that screws onto the standard rear cell threads of M48*0.75mm telescope and accepts 2” accessories, including diagonals, eyepieces (for straight-through viewing), Barlows, webcams, and any other accessory with a 2” insert barrel. Interface Inner Diameter: 2 Inch (about 50.8mm) Thread: M48*0.75mm Total Length: 50mm Outer Diameter: 59mm Package Include: 1 x 2" to M48 Visual Back Tube Note: Please allow 0-2mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! If you really care about these details, pls DO NOT order.