National Pressure Cooker Co. National Pressure Canner Cooker Model number 5 Parts. Parts also fit Guardian Service Ware Pressure Cooker 12 quart National Model 5 Sealing ring $15.99 Presto 9911 Over pressure/Automatic Air Vent Regular price: $3.99 Sale price: $2.00 82087 Steam Gauge $19.98 Presto 85485 Pressure Canner Regulator Kit $16.99 85444 Cover Handle $8.49 85443 Body Handle $8.49 Presto Pressure Cooker Cooking Rack 85622 $9.49