This drop down glass adapter is designed to fit perfectly with your glass setup. Made of high-quality borosilicate glass, it is durable and long-lasting. Its clear color allows you to easily see the flow of your smoke or vapor. The 4" Z-shape design of the adapter makes it easy to use and the 14mm male to 18mm female size is perfect for most setups. This glass adapter is perfect for those who want to enhance their smoking or vaping experience.