With our unique patented gasket design (Patent #9475627) this chamber gasket is sure to last 10,000 uses with proper care and maintenance. The gasket itself is reversible, allowing customers to instantly take it off and flip it over. This Gasket fits the following Vacuum Chamber Lids: Best Value Vacs 7 Gallon Aluminum Vacuum and Degassing Chamber Best Value Vacs 15 Gallon Aluminum Vacuum and Degassing Chamber | BVV 16.75Vacuum Chamber Gasket