Rare Vintage Solid Brass 4 3/4" Trim Collar For Wood Stove Chimney New. Inside diameter is 4 3/4".  I am assuming it's for 5" pipe.  Outside diameter is 11 1/2".  There is a plastic coating on brass that peels off.  These are the exact measurements.  No returns.  Please view photos for exact condition.  I will ship it in it's original box.  Thanks!