SV211 dovetail base comfortable and convenient carrying handle, after the combined installation, the large-aperture telescope can be easily carried and moved, full CNC integrated finishing anodized aluminum, strong and durable, can be used for a long time. Easy to install, SV211 finder scope mount bracket the length is 203mm, with 2 M6 mounting screws, 4 M4 set screws, and 1 M5 wrench, which can be easily installed and removed. Protect the telescope, reduce collision and wear when taking the telescope somewhere, unified interface type; strong matching type. Fit for OTA: SV503-102mm f/7 SV550 122mm f/7 Brand: SVBONY Model: SV211 Color: Red Material: 6061T Aluminums Length: 203mm Width: 42mm High: 39mm Net Weight: 161.5g / 5.7oz Package Includes: 1X Handle Bar 2X M6 mount screws 4X M4 Set Screws 1X M5 Wrench SVBONY universal dovetail base for optical astronomical telescope finder scope; Universal dovetail base for finder scope: Ideal for custom installation of a finder scope on telescopes not already equipped with a compatible base. Dielectric coatings provides 99% reflectivity M28.5x0.6 filter thread can connect with 1.25in filter directly. Built-in brass ring to prevent the accessories barrel from being scratched. Machined and anodized aluminum housing make the SV188P dielectric diagonal durable and uniform Compatible with Telescope 1.SV188P 1.25in dielectric diagonal compatible with any 1.25in refractor telescope. SV188P can not connect with the SCT telescope directly, the additional adapter is required if you want to connect SV188P with the SCT telescope. SV188P does not fit for reflector telescope. Specifications: Size: 1.25in Coatings: Dielectric Reflectivity: 99% Thread: 28.5*0.6 Material: Aluminum Alloy Screw: M4 Set Screw Net Weight: 125g / 4.41oz Package Includes: 1 x 1.25in 90 Deg Dielectric Mirror Diagonal, 1x M4 Screws, 1x Dust proof plug, 1x Dust proof cover