Adjustable alt-azimuth base for SkyTrackerTM Pro and SkyGyiderTM Pro mounts. Allows for repositioning during polar alignment while a mount is attached to a tripod. The base has a built-in bubble level. It accepts Vixen-type dovetail bar. The altitude adjustment range is from -30º ~ 65º, so you can mount your device/scope on the either side for better balance. This adjustable alt-azi base/wedge also fit with other small camera mounts.