This is a chance to own up to 14 authentic Altec Lansing made throat adapter plates stands that were designed for various Mantaray horns and can be used with select other horns.  The plates are heavy duty and measure approximately 7.5" x 7.5" and weigh 2 lbs each.  They have both the 3 and 4 bolt pattern on the plate plus a second four bolt pattern along the edges.  The 3 and 4 bolt pattern is for a standard 3 and 4 bolt pattern size and the throat cutout is for a 1.4" exit driver.  The 3 bolt pattern measures about 2 7/8" from the center of one hole to the center of the hole next to it.  The inner 4 bolt pattern measures about 3 3/8" from the center of one hole to the center of the hole next to it.  The outer 4 bolt pattern measures about 6" from the center of one hole to the center of the hole next to it.  The price shown is for a single adapter with the option of purchasing up to 14.  These are in nice condition showing minimal signs of use.  There are no gouges or deep ugly scratches or corrosion to any of them.