Briley Ultimate Ultralite 12 ga. to 20 ga. tubes for o/u or SxS, 28" set w/ 2 screw in chokes. THESE ARE NOT DROP IN TUBES! MUST BE GUNSMITH INSTALLED TO YOUR SHOTGUN. Sorry, I do not know what make / model shotgun these were originally fitted to, both forcing cones will need to be lengthned. Please see briley.com website for complete info. $225 shipped.