******************************* Please read the profile before purchasing. ******************************* This is a leveling bracket for VIXEN equatorial mounts. The equatorial mounts used for alignment are SXD2 and SXG half-pillars. Product dimensions: Inner diameter: 130mm Height: 11mm It can be attached to either the equatorial mount or the SXG half-pillar. When attaching directly to the equatorial mount: It should be mountable on SX series mounts. AP series mounts are not compatible due to the different shape of the mount area. It's made to look like a genuine product. Leveling the equatorial mount is a basic requirement for astrophotography, I think. I made this because the equatorial mount itself didn't have a level. It allows leveling with a large level. It's glow-in-the-dark so you can adjust it in the dark without a light. Once it glows, it will continue to glow dimly for several hours, so you can check it at any time during shooting without a light. It's not bright enough to disturb your shooting or those around you. Please check the accuracy of the level to be attached in the third image. It's adjusted and checked to a level where a marble won't roll. Refer to the 10th image for how to attach it. You can fix it by simply tightening the screws, but since you probably won't remove it once you've attached it, if you're concerned, you can use thin double-sided tape to adhere it. Please try not to touch the level when fixing or adjusting the bracket. After adjustment, it's fixed with adhesive, but the accuracy may be affected if strong force is applied. It's made with a 3D printer. This is a homemade product, so it's listed as "no noticeable scratches or stains." Please refrain from purchasing if you are sensitive to such things. The equatorial mount, pillar, and other equipment are not included in the listing. I also use this product, so the design may be subject to change.