Orion 7383 8-Inch Dovetail Mounting Plate Compatible with Orion VersaGo, Versago II, SkyView AZ, and TeleTrack altazimuth mounts Rigid dovetail plate provides a platform for coupling telescope optical tubes to Orion AstroView, SkyView Pro, Sirius, and Atlas equatorial mount 8" long dovetail plate made of extruded, anodized aluminum Attach one to all your telescopes for easy, no-tools swapping of instruments on your Orion mount and tripod