The Corning 431253 3L Baffled Polycarbonate Erlenmeyer Flask with Vent Cap is a high-quality lab flask designed for various disciplines such as physical laboratory, dental laboratory, veterinary medicine, medical laboratory, microbiological laboratory, and biological laboratory. Made of durable polycarbonate material and manufactured in the United States by Corning, this flask has a 3L volume and features a vent cap for easy dispensing. Ideal for precise measurements and experiments, this Erlenmeyer flask set includes four units in a case, making it a convenient and reliable choice for lab professionals.