The Vintage NO. 3140-190 PYREX® 2 pack Glass Crystallizing Dish set is a high-quality piece of lab glassware that was manufactured in the USA. Featuring the iconic PYREX brand and model number, these 190×100 dishes are designed for laboratory use, specifically for crystallizing purposes. The sturdy glass construction and precise measurements make them a reliable and durable tool for various scientific and medical applications. With its vintage charm and timeless functionality, these PYREX® dishes are a valuable addition to any lab or collection.