Those are stock floatation from the builder. They actually are my favorite type of floatation. If they are still holding air, I would put them back in in a heart beat. They weigh nothing, can't hold water, won't rot, and if your worst boating day happens and you sink it, they will help keep the nose afloat so maybe someone can attach a line a drag it back up or at least pull it to the shore. If you don't want them, I would gladly take them off your hands.