Features: Brand new and high quality Precisions technology, multifunctional, thin, ultralightweight. Strong strength aluminum with anodizing aluminum process. This base is with qualtiy metal and features two large thumbscrew lock. Includes screws. Compliable with finderscopes, Pointer bracket / reflexs sight bracket on telescopes, great for add a second / third aim device to your telescope. Drill (not threaded) to accommodate screws up to 5mm in diameter. Great for installation of any finderscopes, Finderscopes reflexs sight, and Green Pointer bracket on any telescope. Dovetail base fit finderscopes / reflexs sight bracket can secure attach aim device to any telescope. Fit most bracket from for C8HD, C925, C11HD, 80ED,102ED,130APO, 100ED, etc. Compliable with finderscopes, Pointer bracket on telescopes. Specifications: Component: Aluminum Color: Blue, Re Size:Approx. 39x42mm/1.54x1.65in Top Edge: 23.70mm Middle Edge: 34mm Radials Slot: 9.5mm Lower Edge: 34mm Crosses Hole Width: 5mm Quantity: 1 set Package Includes: 1pc Finderscopes Base Mount and 1pc Wrenches and Screws note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. please make sure you not mind befores you bid. Due to difference between different monitors, the picture may not reflect the actual color.