Fangrui Product Details Fangrui Product Details Solid Metal Construction Ultra-thin Design, Ultra-. 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 Screw Astronomy Telescope: Finderscope Dovetail Board Astronomy Telescope: Spotting Scopes Telescope Dovetail Board: For Optics Telescope Astronomical Telescope: Multi Function Finderscope Length: Along The 34 Mm Width Of Internal Lock: 5.1mm Horizontal Length Of Internal Lock: 37mm Vertical Length Of Internal Lock: 35.5mm Color: Black Material: Aluminum Alloy Package Contents: 1 * Telescope Dovetail Slot Only 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.