This is a solid aluminum universal dovetail plate with two 1/4-20 threaded holes and four slots for 1/4-20 Allen screws. These can also be used on a camera tripod with a 1/4-20 mounting screw. Based on current information these are the mounts that will work: Omni CG-4mount, CG-5 Computerized mount, NexStar SLT Computerized mount, LCM computerized mount, NexStar 6 SE and 8 SE Computerized Mount, NexStar 4 SE and 5 SE Computerized Mount, Advanced Series Computerized Mount, CGx, EQx, GEM mounts, Celestron CG-5 Mount, Meade LXD-55 Mount, Meade LXD-75 Mount, Most Vixen Mounts, Synta EQ-6, Many SkyWatcher Mounts, Orion mounts, SkyView Pro, Atlas, Sirius, AstroView, and VersaGo mounts. NOTE: Actual product is polished aluminum---see 8 inch dovetail pictures.