Fits the Orion SkyView Pro and probably some other Orion mounts--email before you place an order, so that we can make sure that this is the right unit for your mount. The tripod leg slides into the ScopeRoller, and three bolts lock the ScopeRoller into position on the tripod leg. If the bottom of your tripod leg looks like this, and has these dimensions, you are probably in the right place.
