Amazon.com: Presto Pressure Cooker Sealing Ring/Automatic Air Vent Pack (3 - 4 Quart) (09909) : Home & Kitchen
Amazon.com: 2-Pack of Presto Pressure Cooker Sealing Ring / Gasket & Overpressure Plug (2 Sets per Pack) - Part 09936, 09904 and 50295 - Fits Various 6-Quart Presto Models - By IMPRESA : Home & Kitchen
Presto #09909 Sealing Ring w/Automatic Air Vent for 3 & 4 Quart Pressure Cookers 75741099095 | eBay