Presto Pressure Cooker Sealing Ring/Automatic Air Vent Pack (3 - 4 Quart) The product is Pressure Cooker Sealing Ring With Automatic Air Vent, For 3 & 4 QT Cast Aluminum Models Inc. Easy and simple use kit The product is manufactured in China Includes Automatic Air Vent. Replaces Presto part 1071. Automatic Air Vent replaces parts 393 & 82058.