National Pressure Cooker Co. Model 7 Pressure Canner. Fits National Model 7. Please note; This is a after market Sealing Ring Made in U.S.A. IN STOCK. opn7$12.49 Order before 2:00 PM ET this item will ship same day. Orders placed after 2:00 PM will ship next business day! Also fits National Model 14 Steamliner Pressure Cooker Model A. (16 and 21 liquid quart size) Farm CO-OP Model A. Model A CO-OP Pressure Cooker made by National Cooperatives, Inc.