This is a 'new old stock' set of BEAR / JENNINGS CROSSBOW SCOPE MOUNT RINGS, part number 7591. From the package: 

• Adapts 1" rifle or pistol scopes for use with Bear Crossbow Scope Rail 7590

Installation and set-up instructions are on the package. Package is a little rough from storage.

Please be sure to check our other listings this week for more archery and bowhunting items.

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Shipping for this item is 3.50 in the U.S.  I will gladly combine multiple items to give you the lowest possble shipping cost. Due do to my current work schedule I am only on the computer for a limited time each day but will contact the buyer as soon as possible after purchase. Thanks for looking!