Features: Brand new and high quality Strong strength aluminum with anodizing aluminum process. This base is with quality metal and feature two large thumbscrew lock. Widely used on various dovetail plate, and most guide plate is suitable for any type of bridge astronomicals telescope. Great to accepts the dovetail plate. Feature two locking thumbscrews for better stability and reliability. The crosses slot can accomodate hexagons screws. Elevates your outdoor experiences with our telescope base. Whether on trail / camping, its a valuable tool for capturing unique picture. Specifications: Component: Aluminum Color: Silver Size:Approx. Top Edge: 25mm Lower Edge: 35mm Middle Opening Length: 33.0mm Height: 20mm Quantity: 1Pc Package Includes: 1pc Finderscope Base Mount 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.