Presto Pressure Cooker Model “633 (6 Liter)”. Parts List for Presto “633 (6 Liter)” Pressure Cooker. Service parts for the Presto® model “633 (6 Liter)” may be ordered on-line using the links below. Presto 9902 Pressure Cooker Sealing Ring 09902$9.99 9978 Pressure Cooker,Pressure Regulator (Jiggler) 9978$8.89 1058 Vent Pipe 1058$8.49 Presto 85454 Pressure Cooker Body Handle 85454$10.49 8 in. dia. Canning Rack 85360$8.95 Cooking and Canning Company recommends using Genuine Presto® OEM parts when available. *When OEM parts are unavailable, discontinued or no longer supported by OEM; replacement parts are made to fit Presto models. *Orders placed before 2:00 PM ET will ship same day. Orders placed after 2:00 PM will ship next business day! * IN STOCK ITEMS *These parts, when installed correctly, will fit Presto models accordingly. Need Help? Your pressure canner parts specialist. 800 851 3266 admin@cookingandcanning.net "Presto" is a registered trademark of National Presto Industries, Inc.