Feature: 1. Special Design: The telescope finderscope bracket comes with two large thumb locks, including two M4 screws, ensuring smoother surfaces and precise orbital cuts, 2. Aluminum Alloy Material: Finder scope mounting bracket is made of high quality aluminum alloy, which is rust proof, strong and durable, 3. Easy to Use: The aluminum alloy finderscope mounting is easy to use and allows you to mount a telescope guide on your telescope. 4. Wide Compatibility: The finderscope base is ideal for custom mounting a viewfinder on any telescope with a wide range of compatibility. 5. Scope of Use: Universal dovetail base is suitable for C8/C8HD/C925/C11HD, for SKY ROVER 80ED/102ED/130APO/100ED binoculars and other primary mirrors. Specification: Item Type: Finderscope Base Material: Aluminum Alloy Top Edge:Approx. 23.4mm / 0.9in Middle Edge:Approx. 34mm / 1.3in Slot Edge:Approx. 9mm / 0.4in Bottom Edge:Approx. 34mm / 1.3in Screw: M4 Thread (Approx. 10mm / 0.4in Length). Package List: 1 x Finderscope Base