Solid metal construction ultra-thin design, ultra-lightweight.It can be installed to: for C8, C8HD, C925, C11HD, for SKYRVER: 80ED, 102ED, 130APO, for SKYRVER 100ED binoculars, and other primary mirror, can be mounted to the sharpstar, another model.Can be fixed: M3-M5 screwAstronomy telescope: Finderscope dovetail boardastronomy telescope: Spotting Scopes telescopeDovetail Board: for optics TelescopeAstronomical Telescope: Multi Function FinderscopeLength: along the 34 mmWidth of internal lock: 5.1mmHorizontal length of internal lock: 37mmVertical length of internal lock: 35.5mmColor: blackMaterial: Aluminum alloyPackage Contents:1 * Telescope Dovetail SlotOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.