The Chemglass 100 Chemrus 20mL Filter Funnels are medium-sized funnels designed for use in various laboratory settings, including dental, medical, microbiological, and biological laboratories. Manufactured in the United States, these filter funnels are ideal for precise filtration tasks. With a brand known for quality and the model number Cr-1018-40, these Chemrus funnels are a reliable choice for professionals in need of high-quality glassware and plasticware for their work in healthcare, laboratory, and industrial settings.