Door Hardware & Locks Presto Pressure Cooker/Canner Air Vent Cover/Lock Posted On July 6, 2015 at 12:58 am by bulbadmin / No Comments Presto Pressure Cooker/Canner Air Vent Cover/LockProduct Features The air vent/cover lock automatically exhausts air from the pressure cooker/canner as you begin heating the unit.Acts as a visual Read More