Mount Adapter: The finderscope mount bracket is used for the installation of the finder scope on the optical telescope Wide Compatibility: The finder scope mount base is universal for any diameter telescope tube, suitable for 5P9966 Material: The mount adapter is made of quality aluminum alloy material, CNC processed, wear resistant, sturdy to use Stable Connection: Professional manufacturing astronomical telescope accessories, the telescope finderscope mount bracket is tightly clamped with screws, providing a stable connection, has a long service life Portable Size: The mount groove plate is compact and lightweight, easy to store and carry Specification: Material: aluminum alloy 39x42x20mm/1.54x1.65x0.79inch Package Includes: 1 Finderscope Mount Bracket Note: Please allow slightly errors due to manual measurement and different monitors.