Glassworking Hollow flat-head stopper and ball stopper for laboratory and weighing instrument use In former years, glass workers made these products by hand, piece by piece. Iwata Glass succeeded in mechanizing those manual procedures. We use our ingenuity in making any type of glassware, even of a shape apparently difficult to realize. We will be happy to answer any questions you may have, such as: "Do you sell such-and-such kind of glassware?" or "Can you make this product out of glass?"
	Flat-head stopper and ball stopper