Thank you for showing your interest in Supply Line Connector from Oxygen Equipment. The Supply Line Connector is a product of B & F - Allied Healthcare and is thereby made of the highest quality. If you have any questions regarding Supply Line Connector or any product in Oxygen Equipment, please contact us. Our experienced personnel will answer any questions you have about Supply Line Connector. Also, if you are interested in purchasing large quantities of Supply Line Connector or any Oxygen Equipment, please contact Customer Service.