Thank you for showing your interest in 7' Smooth Bore Oxygen Tubing W/connectors,each from B & F - Allied Healthcare (BF). The 7' Smooth Bore Oxygen Tubing W/connectors,each is a product of B & F - Allied Healthcare and is thereby made of the highest quality. If you have any questions regarding 7' Smooth Bore Oxygen Tubing W/connectors,each or any product in B & F - Allied Healthcare (BF), please contact us. Our experienced personnel will answer any questions you have about 7' Smooth Bore Oxygen Tubing W/connectors,each. Also, if you are interested in purchasing large quantities of 7' Smooth Bore Oxygen Tubing W/connectors,each or any B & F - Allied Healthcare (BF), please contact Customer Service.