An agglomerated cork that offers a great seal using compressed pieces of small cork. Fantastic value. Because they do not compress as easy as natural corks, you will need a floor corker, as opposed to a handcorker, to push these into the bottles.
These are very uniform and sturdy corks that don't chip or break easily. Contrary to the product description, I have used these very successfully with a very cheap hand corker -- the Mini Corker.
