Check the listing for details. Endure Adjustable Adult Oxygen Venturi Mask with Accessories, Large Size. Condition: New. Listed at 8.99 USD. Venturi masks are designed to deliver a specific oxygen concentration to avoid over oxygenation. They come with a 7 ft tubing and are made of medical grade PVC. There are multiple color coded diluters for easy oxygen rate identification. Oxygen delivery rate varies from 24-60%. Transparent mask allows to monitor facial color & vital functions. Patient friendly with comfortable mask Sold as a Pack of 1, 2, 5, 10 Latex freeVenturi masks are designed to deliver a specific oxygen concentration to avoid over oxygenation. They come with a 7 ft tubing and are made of medical grade PVC. There are multiple color coded diluters for easy oxygen rate identification. Oxygen delivery rate varies from 24-60%. Transparent mask allows to monitor facial color & vital functions. Patient friendly with comfortable mask Sold as a Pack of 1, 2, 5, 10 Latex free