This Vixen size mounting rail has two wide slots for mounting screws that are either 1/4-20 or 6 mm in size. Works well as a mounting rail or as a top mounting rail for guidescopes if your rings are spaced between 1" and 4-1/4" apart. Made of aluminum, black anodized and has a 1/4-20 threaded hole in the center.
*Hardware included*
