The Ace Glass Bottom Drip Adapter with a 1:5 threading and 2mm glass stopcock (Model 5835-11) is a high-quality threaded adapter made of borosilicate glass, ideal for use in various laboratory settings such as physical, dental, medical, microbiological, and biological laboratories. This product, manufactured in the United States by Ace Glass, is designed to provide a secure connection for draining purposes, making it a reliable and durable addition to any laboratory setup.