This is an OEM part from Presto. This Cover Lock is used on many models of Presto pressure cookers and canners. The Post is made of steel and the gaskets are made of rubber. This part is used to lock the lid to the pot making it so the lid will not open while under pressure. Another part that is commonly ordered with the Cover Lock is the Pressure Regulator (part number 09978).
This is an original Presto part. This Gasket is used on many models of Presto pressure cookers and caners. This Gasket attaches onto the Lock Post (part number 85610). It is common for this part to ware out overtime and should be replaced on a regular basis to help prevent leaking. This Gasket simply slips onto the end of the Lock post. When replacing this part, it is recommended to clean the sealing surfaces.
This is a genuine Presto replacement part designed for use with pressure canners and cookers. This vent pipe is a safety feature, once the pressure is at a certain point the center of this part will pop up. This will not allow you to remove the lid until either the pressure is released by the pressure regulator or the cooker has been taken from the heat source. It is made out of metal and it is sold individually.